System.Collections.Generic.IEnumerable.ToArray()

private static void CheckSetKeys(HashSet<string> set)
        {
            var keys = set.ToArray();

            foreach (var key in keys)
            {
                if (!CacheManager.TryGetCachedResult<object>(key,out object val))
                {
                    set.Remove(key);
                }
            }
        }

public static string[] GetKeysFromKeySet(KeysetId setId)
        {
            HashSet<string> set;

            var cksc = CacheSet.GetKeysetContext(setId,false);

            if (cksc == null)
                return null;

            TryGetCachedResult<HashSet<string>>(cksc.CacheSetKey, out set);

            if (set == null)
                return null;

            return set.ToArray();
        }

public override string[] GetRegistered()
            => LoadRaw<Global>(GlobalPath).UIDs.Values.ToArray();

public override string[] GetAll()
            => !Directory.Exists(UserRoot) ? Dummy<string>.EmptyArray : Directory.GetDirectories(UserRoot).Select(name => Path.GetFileName(name)).ToArray();

[RCEndpoint(false, "/channels", null, null, "Channel List", "Basic channel list.")]
        public static void Channels(Frontend f, HttpRequestEventArgs c) {
            IEnumerable<Channel> channels = f.Server.Channels.All;
            if (!f.IsAuthorized(c))
                channels = channels.Where(c => !c.IsPrivate);
            f.RespondJSON(c, channels.Select(c => new {
                c.ID, c.Name, c.IsPrivate,
                Players = c.Players.Select(p => p.ID).ToArray()
            }).ToArray());
        }

public static string[] Headers(this MailItem mailItem, string name)
        {
            var headers = mailItem.HeaderLookup();
            if (headers.Contains(name))
                return headers[name].ToArray();
            return new string[0];
        }

private static Type[] _GetTypes()
            => _Getreplacedemblies().SelectMany(_GetTypes).ToArray();

public T[] GetRefs<T>() where T : DataType<T>
            => GetRefs(DataTypeToID[typeof(T)]).Cast<T>().ToArray();

private static ClreplacedDeclarationSyntax GenerateClreplaced(SqModelMeta meta, bool rwClreplacedes, ClreplacedDeclarationSyntax? existingClreplaced)
        {
            ClreplacedDeclarationSyntax result;
            MemberDeclarationSyntax[]? oldMembers = null;
            Dictionary<string,SyntaxList<AttributeListSyntax>>? oldAttributes = null;
            if (existingClreplaced != null)
            {
                result = existingClreplaced;

                oldMembers = result.Members
                    .Where(md =>
                    {
                        if (md is ConstructorDeclarationSyntax)
                        {
                            return false;
                        }

                        if (md is IncompleteMemberSyntax)
                        {
                            return false;
                        }

                        if (md is PropertyDeclarationSyntax p)
                        {
                            if (meta.Properties.Any(mp => mp.Name == p.Identifier.ValueText))
                            {
                                if (p.AttributeLists.Count > 0)
                                {
                                    oldAttributes ??= new Dictionary<string, SyntaxList<AttributeListSyntax>>();
                                    oldAttributes.Add(p.Identifier.ValueText, p.AttributeLists);
                                }
                                return false;
                            }
                        }

                        if (md is MethodDeclarationSyntax method)
                        {
                            var name = method.Identifier.ValueText;

                            if (name.StartsWith("With") || AllMethods.Contains(name) || name.StartsWith(MethodNameGetReader + "For") || name.StartsWith(MethodNameGetUpdater + "For"))
                            {
                                return false;
                            }
                        }

                        if (md is ClreplacedDeclarationSyntax clreplacedDeclaration)
                        {
                            var name = clreplacedDeclaration.Identifier.ValueText;

                            if (name == meta.Name + ReaderClreplacedSuffix || name.StartsWith(meta.Name + ReaderClreplacedSuffix + "For"))
                            {
                                return false;
                            }
                            if (name == meta.Name + UpdaterClreplacedSuffix || name.StartsWith(meta.Name + UpdaterClreplacedSuffix + "For"))
                            {
                                return false;
                            }
                        }

                        return true;
                    })
                    .ToArray();

                result = result.RemoveNodes(result.DescendantNodes().OfType<MemberDeclarationSyntax>(), SyntaxRemoveOptions.KeepNoTrivia)!;

            }
            else
            {
                result = SyntaxFactory.ClreplacedDeclaration(meta.Name)
                    .WithModifiers(existingClreplaced?.Modifiers ?? Modifiers(SyntaxKind.PublicKeyword));
            }

            result = result
                .AddMembers(Constructors(meta)
                    .Concat(GenerateStaticFactory(meta))
                    .Concat(rwClreplacedes ? GenerateOrdinalStaticFactory(meta) : Array.Empty<MemberDeclarationSyntax>())
                    .Concat(Properties(meta, oldAttributes))
                    .Concat(GenerateWithModifiers(meta))
                    .Concat(GenerateGetColumns(meta))
                    .Concat(GenerateMapping(meta))
                    .Concat(rwClreplacedes ? GenerateReaderClreplaced(meta): Array.Empty<MemberDeclarationSyntax>())
                    .Concat(rwClreplacedes ? GenerateWriterClreplaced(meta) : Array.Empty<MemberDeclarationSyntax>())
                    .ToArray());

            if (oldMembers != null && oldMembers.Length > 0)
            {
                result = result.AddMembers(oldMembers);
            }

            return result;
        }

public static string Splice(this string sql, params Func<bool>[] conditions)
        {
            return sql.Splice(conditions.Select(p => p()).ToArray());
        }

public static DirectoryStructure BuildStructure(IEnumerable<StoredFile> files)
        {
            var dirStructure = new DirectoryStructure
            {
                Path = "/"
            };
            foreach (var file in files)
            {
                var pathSegments = GetPathSegments(file.ParentDirPath);
                var targetPathSegmentCount = pathSegments.Length;
                var parent = dirStructure;
                for (int i = 0; i < targetPathSegmentCount; i++)
                {
                    var currentSegment = pathSegments[i];
                    var currentFullPath = JoinPathSegments(pathSegments.Take(i + 1).ToArray());
                    DirectoryStructure nextChild;
                    var existingChild = parent.SubDirectories.Where(x => x.Path == currentFullPath).FirstOrDefault();
                    if (existingChild != null)
                    {
                        nextChild = existingChild;
                    }
                    else
                    {
                        // Create and add next directory
                        nextChild = new DirectoryStructure
                        {
                            Name = currentSegment,
                            Path = parent.Path + currentSegment + "/"
                        };
                        parent.SubDirectories.Add(nextChild);
                    }
                    parent = nextChild;
                }
                parent.Files.Add(file);
            }
            return dirStructure;
        }

public void DetectDisc(string inDir = "", Func<Dumper, string> outputDirFormatter = null)
        {
            outputDirFormatter ??= d => $"[{d.ProductCode}] {d.replacedle}";
            string discSfbPath = null;
            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
            {
                var drives = DriveInfo.GetDrives().Where(d => d.DriveType == DriveType.CDRom && d.IsReady);
                if (string.IsNullOrEmpty(inDir))
                {
                    foreach (var drive in drives)
                    {
                        discSfbPath = Path.Combine(drive.Name, "PS3_DISC.SFB");
                        if (!File.Exists(discSfbPath))
                            continue;

                        input = drive.Name;
                        Drive = drive.Name[0];
                        break;
                    }
                }
                else
                {
                    discSfbPath = Path.Combine(inDir, "PS3_DISC.SFB");
                    if (File.Exists(discSfbPath))
                    {
                        input = Path.GetPathRoot(discSfbPath);
                        Drive = discSfbPath[0];
                    }
                }
            }
            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
            {
                if (string.IsNullOrEmpty(inDir))
                    inDir = "/media";
                discSfbPath = IOEx.GetFilepaths(inDir, "PS3_DISC.SFB", 2).FirstOrDefault();
                if (!string.IsNullOrEmpty(discSfbPath))
                    input = Path.GetDirectoryName(discSfbPath);
            }
            else
                throw new NotImplementedException("Current OS is not supported");

            if (string.IsNullOrEmpty(input) || string.IsNullOrEmpty(discSfbPath))
                throw new DriveNotFoundException("No valid PS3 disc was detected. Disc must be detected and mounted.");

            Log.Info("Selected disc: " + input);
            discSfbData = File.ReadAllBytes(discSfbPath);
            var replacedleId = CheckDiscSfb(discSfbData);
            var paramSfoPath = Path.Combine(input, "PS3_GAME", "PARAM.SFO");
            if (!File.Exists(paramSfoPath))
                throw new InvalidOperationException($"Specified folder is not a valid PS3 disc root (param.sfo is missing): {input}");

            using (var stream = File.Open(paramSfoPath, FileMode.Open, FileAccess.Read, FileShare.Read))
                ParamSfo = ParamSfo.ReadFrom(stream);
            CheckParamSfo(ParamSfo);
            if (replacedleId != ProductCode)
                Log.Warn($"Product codes in ps3_disc.sfb ({replacedleId}) and in param.sfo ({ProductCode}) do not match");

            // todo: maybe use discutils instead to read TOC as one block
            var files = IOEx.GetFilepaths(input, "*", SearchOption.AllDirectories);
            DiscFilenames = new List<string>();
            var totalFilesize = 0L;
            var rootLength = input.Length;
            foreach (var f in files)
            {
                try { totalFilesize += new FileInfo(f).Length; } catch { }
                DiscFilenames.Add(f.Substring(rootLength));
            }
            TotalFileSize = totalFilesize;
            TotalFileCount = DiscFilenames.Count;

            OutputDir = new string(outputDirFormatter(this).ToCharArray().Where(c => !InvalidChars.Contains(c)).ToArray());
            Log.Debug($"Output: {OutputDir}");
        }

public async Task NodeMonitor(CancellationToken cancellationToken)
        {
            Logger.LogTrace("Start refresh service status,waiting for locking...");
            using (await AsyncLock.LockAsync(cancellationToken))
            {
                if (cancellationToken.IsCancellationRequested)
                    return;

                foreach (var service in ServiceNodes)
                {
                    Logger.LogTrace($"Service {service.Key} refreshing...");
                    try
                    {
                        var healthNodes = await QueryServiceAsync(service.Key, cancellationToken);
                        if (cancellationToken.IsCancellationRequested)
                            break;

                        var leavedNodes = service.Value.Where(p => healthNodes.All(a => a.ServiceId != p.ServiceId))
                            .Select(p => p.ServiceId).ToArray();
                        if (leavedNodes.Any())
                        {
                            //RemoveNode(service.Key, leavedNodes);
                            if (!ServiceNodes.TryGetValue(service.Key, out var services)) return;
                            services.RemoveAll(p => leavedNodes.Any(n => n == p.ServiceId));
                            OnNodeLeave?.Invoke(service.Key, leavedNodes);
                            Logger.LogTrace($"These nodes are gone:{string.Join(",", leavedNodes)}");
                        }

                        var addedNodes = healthNodes.Where(p =>
                                service.Value.All(e => e.ServiceId != p.ServiceId)).Select(p =>
                                new ServiceNodeInfo(p.ServiceId, p.Address, p.Port, p.Weight, p.EnableTls, p.Meta))
                            .ToList();

                        if (addedNodes.Any())
                        {
                            //AddNode(service.Key, addedNodes);
                            if (ServiceNodes.TryGetValue(service.Key, out var services))
                                services.AddRange(addedNodes);
                            else
                                ServiceNodes.TryAdd(service.Key, addedNodes);

                            OnNodeJoin?.Invoke(service.Key, addedNodes);

                            Logger.LogTrace(
                                $"New nodes added:{string.Join(",", addedNodes.Select(p => p.ServiceId))}");
                        }
                    }
                    catch
                    {
                        // ignored
                    }
                }
                Logger.LogTrace("Complete refresh.");
            }
        }

[HarmonyPostfix]
            public static void Postfix(ref Game __instance) {
                var ms = ScriptableObjectSingleton<GameData>._instance.mapSet.Maps.items;

                for (var i = 0; i < ms.Length; i++) {
                    ms[i].isDebug = ms[i].isBrowserOnly = false;
                }

                var impls = new MapImpl[] { BigFoot.VALUE, Daffodils.VALUE, Shipwreck.VALUE };

                ScriptableObjectSingleton<GameData>._instance.mapSet.Maps.items = ms.AddAll(impls.Select(impl => impl.GetCreated()).ToArray());
            }

private static byte[] GetSha1Hmac(Span<byte> data, Span<byte> key)
        {
            if (key.Length != 0x40)
                throw new ArgumentException(nameof(key));

            var ipad = new byte[0x40];
            var tmp = new byte[0x40 + 0x14]; // opad + hash(ipad + message)

            for (var i = 0; i < ipad.Length; i++)
            {
                tmp[i] = (byte)(key[i] ^ 0x5c); // opad
                ipad[i] = (byte)(key[i] ^ 0x36);
            }

            using (var sha1 = SHA1.Create())
            {
                sha1.TransformBlock(ipad.ToArray(), 0, ipad.Length, null, 0);
                sha1.TransformFinalBlock(data.ToArray(), 0, data.Length);
                Buffer.BlockCopy(sha1.Hash, 0, tmp, 0x40, 0x14);
            }
            using (var sha1 = SHA1.Create())
                return sha1.ComputeHash(tmp);
        }

public async Task DeleteByPrefix(string prefix)
    {
        var pageSize = 1000;
        var pageOffset = 0;
        var hasEnd = false;
        while (!hasEnd)
        {
            var keys = GetKeysByPrefix(prefix, pageSize, pageOffset);
            if (keys == null || !keys.Any())
            {
                hasEnd = true;
            }
            else
            {
                try
                {
                    await _db.KeyDeleteAsync(keys.ToArray());
                }
                catch (RedisCommandException ex)
                {
                    if (ex.Message.StartsWith("Multi-key operations must involve a single slot;"))
                    {
                        await Task.WhenAll(keys.Select(m => _db.KeyDeleteAsync(m)));
                    }
                    else
                    {
                        throw ex;
                    }
                }
            }
        }
    }

public static Type CreateType(Type interfaceType)
        {
            try
            {
                TypeBuilder typeBuilder = Impreplacedembly.DefineInterfaceImpType(interfaceType);

                List<MemberInfo> allMembers = interfaceType.GetAllInterfaceMembers();

                List<MethodInfo> propertyInfos = new List<MethodInfo>();

                foreach (PropertyInfo prop in allMembers.OfType<PropertyInfo>())
                {
                    Type propType = prop.PropertyType;

                    PropertyBuilder propBuilder = typeBuilder.DefineProperty(prop.Name, prop.Attributes, propType, Type.EmptyTypes);

                    MethodInfo iGetter = prop.GetMethod;
                    MethodInfo iSetter = prop.SetMethod;
                    if (iGetter != null)
                    {
                        propertyInfos.Add(iGetter);
                    }

                    if (iSetter != null)
                    {
                        propertyInfos.Add(iSetter);
                    }

                    if (prop.Name == "Item")
                    {
                        if (iGetter != null)
                        {
                            MethodAttributes accessor = iGetter.Attributes;
                            accessor &= ~MethodAttributes.Abstract;
                            MethodBuilder methBuilder = typeBuilder.DefineMethod(iGetter.Name, accessor, iGetter.ReturnType, iGetter.GetParameters().Select(e => e.ParameterType).ToArray());
                            ILGenerator il = methBuilder.GetILGenerator();
                            il.Emit(OpCodes.Newobj, typeof(NotImplementedException).GetConstructors()[0]);
                            il.Emit(OpCodes.Throw);
                            propBuilder.SetGetMethod(methBuilder);
                        }
                        if (iSetter != null)
                        {
                            MethodAttributes accessor = iSetter.Attributes;
                            accessor &= ~MethodAttributes.Abstract;
                            MethodBuilder methBuilder = typeBuilder.DefineMethod(iSetter.Name, accessor, iSetter.ReturnType, iSetter.GetParameters().Select(e => e.ParameterType).ToArray());
                            ILGenerator il = methBuilder.GetILGenerator();
                            il.Emit(OpCodes.Newobj, typeof(NotImplementedException).GetConstructors()[0]);
                            il.Emit(OpCodes.Throw);
                            propBuilder.SetSetMethod(methBuilder);
                        }
                        continue;
                    }


                    Func<FieldInfo> getBackingField;
                    {
                        FieldInfo backingField = null;
                        getBackingField =
                            () =>
                            {
                                if (backingField == null)
                                {
                                    backingField = typeBuilder.DefineField("_" + prop.Name + "_" + Guid.NewGuid(), propType, FieldAttributes.Private);
                                }

                                return backingField;
                            };
                    }

                    if (iGetter != null)
                    {
                        MethodAttributes accessor = iGetter.Attributes;
                        accessor &= ~MethodAttributes.Abstract;

                        MethodBuilder methBuilder = typeBuilder.DefineMethod(iGetter.Name, accessor, propType, Type.EmptyTypes);
                        ILGenerator il = methBuilder.GetILGenerator();
                        il.Emit(OpCodes.Ldarg_0);
                        il.Emit(OpCodes.Ldfld, getBackingField());
                        il.Emit(OpCodes.Ret);
                        propBuilder.SetGetMethod(methBuilder);
                    }

                    if (iGetter != null || iSetter != null)
                    {
                        MethodAttributes accessor = iSetter != null ? iSetter.Attributes : MethodAttributes.Private;
                        string name = iSetter != null ? iSetter.Name : "set_" + prop.Name;

                        accessor &= ~MethodAttributes.Abstract;

                        MethodBuilder methBuilder = typeBuilder.DefineMethod(name, accessor, typeof(void), new[] { propType });
                        ILGenerator il = methBuilder.GetILGenerator();

                        if (iGetter != null)
                        {
                            il.Emit(OpCodes.Ldarg_0);
                            il.Emit(OpCodes.Ldarg_1);
                            il.Emit(OpCodes.Stfld, getBackingField());
                            il.Emit(OpCodes.Ret);
                        }
                        else
                        {
                            il.Emit(OpCodes.Ret);
                        }

                        propBuilder.SetSetMethod(methBuilder);
                    }
                }

                foreach (MethodInfo method in allMembers.OfType<MethodInfo>().Except(propertyInfos))
                {
                    MethodBuilder methBuilder = typeBuilder.DefineMethod(method.Name, MethodAttributes.Private | MethodAttributes.HideBySig | MethodAttributes.NewSlot | MethodAttributes.Virtual | MethodAttributes.Final, method.ReturnType, method.GetParameters().Select(e => e.ParameterType).ToArray());
                    if (method.IsGenericMethod)
                    {
                        methBuilder.DefineGenericParameters(method.GetGenericArguments().Select(e => e.Name).ToArray());
                    }
                    ILGenerator il = methBuilder.GetILGenerator();
                    il.Emit(OpCodes.Newobj, typeof(NotImplementedException).GetConstructors()[0]);
                    il.Emit(OpCodes.Throw);

                    typeBuilder.DefineMethodOverride(methBuilder, method);
                }

                return typeBuilder.CreateTypeInfo();
            }
            catch
            {
                throw BssomSerializationTypeFormatterException.UnsupportedType(interfaceType);
            }
        }

private IList<string> WrapTopicFiltersToString(IEnumerable<ITopicFilter> topicFilters)
        {
            return WrapTopicFilters(topicFilters).Select(x => x.Topic).ToArray();
        }

private static byte[][] UnwrapCertificates(IEnumerable<byte[]> certificates)
        {
            return certificates?.ToArray();
        }

internal async Task<IHttpRequestResponse> ParseAsync(Stream stream, CancellationToken ct)
        {
            _disposableParserCompletion = _parserDelegate.ParserCompletionObservable
                .Subscribe(parserState =>
                {
                    switch (parserState)
                    {
                        case ParserState.Start:
                            break;
                        case ParserState.Parsing:
                            break;
                        case ParserState.Completed:
                            break;
                        case ParserState.Failed:
                            HasParsingError = true;
                            break;
                        default:
                            throw new ArgumentOutOfRangeException(nameof(parserState), parserState, null);
                    }
                },
                ex => throw ex,
                () =>
                {
                    IsDone = true;
                });
            
            await Observable.While(
                    () => !HasParsingError && !IsDone,
                    Observable.FromAsync(() => ReadBytesAsync(stream, ct)))
                .Catch<byte[], SimpleHttpListenerException>(ex =>
                {
                    HasParsingError = true;
                    return Observable.Return(Enumerable.Empty<byte>().ToArray());
                })
                .Where(b => b != Enumerable.Empty<byte>().ToArray())
                .Where(bSegment => bSegment.Length > 0)
                .Select(b => new ArraySegment<byte>(b, 0, b.Length))
                .Select(bSegment => _parser.Execute(bSegment));

            _parser.Execute(default);

            _parserDelegate.RequestResponse.MajorVersion = _parser.MajorVersion;
            _parserDelegate.RequestResponse.MinorVersion = _parser.MinorVersion;
            _parserDelegate.RequestResponse.ShouldKeepAlive = _parser.ShouldKeepAlive;

            return _parserDelegate.RequestResponse;
        }

private async Task<byte[]> ReadBytesAsync(Stream stream, CancellationToken ct)
        {
            if (_parserDelegate.RequestResponse.IsEndOfRequest || HasParsingError)
            {
                IsDone = true;
                return Enumerable.Empty<byte>().ToArray();
            }

            if (ct.IsCancellationRequested)
            {
                return Enumerable.Empty<byte>().ToArray();
            }

            var b = new byte[1];
            
            if (stream == null)
            {
                throw new Exception("Read stream cannot be null.");
            }

            if (!stream.CanRead)
            {
                throw new Exception("Stream connection have been closed.");
            }

            var bytesRead = 0;

            try
            {
                //Debug.WriteLine("Reading byte.");
                bytesRead = await stream.ReadAsync(b, 0, 1, ct).ConfigureAwait(false);
                //Debug.WriteLine("Done reading byte.");
            }
            catch (Exception ex)
            {
                HasParsingError = true;
                throw new SimpleHttpListenerException("Unable to read network stream.", ex);
            }

            if (bytesRead < b.Length)
            {
                IsDone = true;
            }

            return _errorCorrections.Contains(ErrorCorrection.HeaderCompletionError) 
                ? ResilientHeader(b) 
                : b;
        }

private byte[] ResilientHeader(byte[] b)
        {
            if (!IsDone)
            {
                _last4BytesCircularBuffer.Enqueue(b[0]);
            }
            else
            {
                if (!_parserDelegate.IsHeaderDone)
                {
                    var last4Byte = _last4BytesCircularBuffer.ToArray();

                    if (last4Byte != _correctLast4BytesReversed)
                    {
                        byte[] returnNewLine = { 0x0d, 0x0a };

                        var correctionList = new List<byte>();

                        if (last4Byte[0] != _correctLast4BytesReversed[0] || last4Byte[1] != _correctLast4BytesReversed[1])
                        {
                            correctionList.Add(returnNewLine[0]);
                            correctionList.Add(returnNewLine[1]);
                        }

                        if (last4Byte[2] != _correctLast4BytesReversed[2] || last4Byte[3] != _correctLast4BytesReversed[3])
                        {
                            correctionList.Add(returnNewLine[0]);
                            correctionList.Add(returnNewLine[1]);
                        }

                        if (correctionList.Any())
                        {
                            return correctionList.Concat(correctionList.Select(x => x)).ToArray();
                        }
                    }
                }
            }

            return b;
        }

public static T Is<T>(this T actual, T expected)
        {
            if (expected == null)
            {
                replacedert.Null(actual);
                return actual;
            }

            if (typeof(T) != typeof(string) && typeof(IEnumerable).GetTypeInfo().IsreplacedignableFrom(typeof(T)))
            {
                replacedert.Equal(
                    ((IEnumerable)expected).Cast<object>().ToArray(),
                    ((IEnumerable)actual).Cast<object>().ToArray());
                return actual;
            }

            replacedert.Equal(expected, actual);
            return actual;
        }

private static async Task<byte[]> ReadOneByteAtTheTimeAsync(Stream stream, CancellationToken ct)
        {
            if (ct.IsCancellationRequested)
            {
                return Enumerable.Empty<byte>().ToArray();
            }

            var oneByteArray = new byte[1];

            try
            {
                if (stream == null)
                {
                    throw new Exception("Read stream cannot be null.");
                }

                if (!stream.CanRead)
                {
                    throw new Exception("Stream connection have been closed.");
                }

                var bytesRead = await stream.ReadAsync(oneByteArray, 0, 1, ct).ConfigureAwait(false);

                if (bytesRead < oneByteArray.Length)
                {
                    throw new Exception("Stream connection aborted unexpectedly. Check connection and socket security version/TLS version).");
                }
            }
            catch (ObjectDisposedException)
            {
                Debug.WriteLine("Ignoring Object Disposed Exception - This is an expected exception.");
                return Enumerable.Empty<byte>().ToArray();
            }
            catch (IOException)
            {
                return Enumerable.Empty<byte>().ToArray();
            }

            return oneByteArray;
        }

public static byte[] Decrypt(byte[] key, byte[] data)
        {
            return EncryptOutput(key, data).ToArray();
        }

private static byte[] EncryptInitalize(byte[] key)
        {
            byte[] s = Enumerable.Range(0, 256)
              .Select(i => (byte)i)
              .ToArray();
            for (int i = 0, j = 0; i < 256; i++)
            {
                j = (j + key[i % key.Length] + s[i]) & 255;
                Swap(s, i, j);
            }
            return s;
        }

private static IObservable<byte[]> CreateByteStreamObservable2(Stream stream, TcpClient tcpClient, CancellationToken ct)
        {
            var observableBytes = Observable.Create<byte[]>(obs =>
            {
                while (!ct.IsCancellationRequested)
                {
                    if (ct.IsCancellationRequested || !tcpClient.Connected)
                    {
                        obs.OnNext(Enumerable.Empty<byte>().ToArray());
                    }

                    var oneByteArray = new byte[1];

                    try
                    {
                        if (stream == null)
                        {
                            throw new Exception("Read stream cannot be null.");
                        }

                        if (!stream.CanRead)
                        {
                            throw new Exception("Stream connection have been closed.");
                        }

                        var bytesRead = stream.ReadByte();

;                        //var bytesRead = await stream.ReadAsync(oneByteArray, 0, 1, ct).ConfigureAwait(false);

                        if (bytesRead < oneByteArray.Length)
                        {
                            throw new Exception("Stream connection aborted unexpectedly. Check connection and socket security version/TLS version).");
                        }
                    }
                    catch (ObjectDisposedException)
                    {
                        Debug.WriteLine("Ignoring Object Disposed Exception - This is an expected exception.");
                        obs.OnNext(Enumerable.Empty<byte>().ToArray());
                    }
                    catch (IOException)
                    {
                        obs.OnNext(Enumerable.Empty<byte>().ToArray());
                    }

                    obs.OnNext(oneByteArray);
                }

                obs.OnCompleted();

                return Disposable.Empty;
            });

            return observableBytes.SubscribeOn(Scheduler.Default);
        }

public static byte[] Encrypt(byte[] key, byte[] data)
        {
            return EncryptOutput(key, data).ToArray();
        }

public static string[] BinToBase64Lines(byte[] serialized_object)
        {
            int ofs = serialized_object.Length % 3;
            if (ofs != 0)
            {
                int length = serialized_object.Length + (3 - ofs);
                Array.Resize(ref serialized_object, length);
            }

            string base64 = Convert.ToBase64String(serialized_object, Base64FormattingOptions.InsertLineBreaks);
            return base64.Split(new string[] { Environment.NewLine }, StringSplitOptions.None).Select(s => String.Format("\"{0}\"", s)).ToArray();
        }

public static byte[] CompileToMachineCode(string asmcode)
        {
            var fullcode = $".intel_syntax noprefix\n_main:\n{asmcode}";
            var path = Path.Combine(Directory.GetCurrentDirectory(), "temp");
            var asmfile = $"{path}.s";
            var objfile = $"{path}.o";
            File.WriteAllText(asmfile, fullcode, new UTF8Encoding(false));
            var psi = new ProcessStartInfo("gcc", $"-m32 -c {asmfile} -o {objfile}")
            {
                RedirectStandardError = true,
                RedirectStandardOutput = true,
                UseShellExecute = false,
                CreateNoWindow = true
            };
            var gcc = Process.Start(psi);
            gcc.WaitForExit();
            if (gcc.ExitCode == 0)
            {
                psi.FileName = "objdump";
                psi.Arguments = $"-z -M intel -d {objfile}";
                var objdump = Process.Start(psi);
                objdump.WaitForExit();
                if (objdump.ExitCode == 0)
                {
                    var output = objdump.StandardOutput.ReadToEnd();
                    var matches = Regex.Matches(output, @"\b[a-fA-F0-9]{2}(?!.*:)\b");
                    var result = new List<byte>();
                    foreach (Match match in matches)
                    {
                        result.Add((byte)Convert.ToInt32(match.Value, 16));
                    }

                    return result.TakeWhile(b => b != 0x90).ToArray();
                }
            }
            else
            {
                var err = gcc.StandardError.ReadToEnd();
            }

            throw new ArgumentException();
        }

public static List<int> OrderPaiLordWithColor(List<int> paiarr)
        {
            List<int> _tempList = new List<int>(paiarr);
            for (int i = 0; i < _tempList.Count; i++)
            {
                if (_tempList[i] > 100) _tempList[i] %= 100;
            }
            int[] temparr = _tempList.ToArray<int>();
            Array.Sort<int>(temparr);
            List<int> _ASCList = temparr.ToList<int>();
            _ASCList.Reverse();//默认是升序反转一下就降序了

            //带上花色，有点小复杂 
            Dictionary<int, int> _dicPoker2Count = GetPoker_Count(_ASCList);
            Dictionary<int, int> _dicPoker2CountUsed = new Dictionary<int, int>();
            for (int j = 0; j < _ASCList.Count; j++)
            {
                if (!_dicPoker2CountUsed.ContainsKey(_ASCList[j])) _dicPoker2CountUsed.Add(_ASCList[j], 1);

                for (int c = _dicPoker2CountUsed[_ASCList[j]]; c <= 4; c++)
                {
                    _dicPoker2CountUsed[_ASCList[j]]++;
                    if (paiarr.Contains(_ASCList[j] + 100 * c))
                    {
                        _ASCList[j] = _ASCList[j] + 100 * c;
                        break;
                    }
                }
            }
            return _ASCList;
        }

static Func<Dictionary<string, string>, T> CompilePropertyDeserializer()
        {
            var o_t = typeof(T);
            var o = Expression.Variable(o_t, "o");
            var o_new = Expression.New(typeof(T));

            var d_t = typeof(Dictionary<string, string>);
            var d = Expression.Parameter(d_t, "d");
            var d_mi_try_get_value = d_t.GetMethod("TryGetValue");

            var item_t = typeof(String);
            var item = Expression.Variable(item_t, "item");

            var tc_t = typeof(TypeConverter);
            var tc = Expression.Variable(tc_t, "tc");
            var tc_mi_can_convert_from = tc_t.GetMethod("CanConvertFrom", new[] { typeof(Type) });
            var tc_mi_convert_from = tc_t.GetMethod("ConvertFrom", new[] { typeof(Object) });

            var td_t = typeof(TypeDescriptor);
            var td_mi_get_converter = td_t.GetMethod("GetConverter", new[] { typeof(Type) });

            var binds = o_t.GetProperties(BindingFlags.Public | BindingFlags.Instance)
                .Where(x => x.CanRead)
                .Select(x =>
                {
                    var value_t = x.PropertyType;
                    var value = Expression.Variable(value_t, "value");
                    var target = Expression.Label(x.PropertyType);

                    return Expression.Bind(x, Expression.Block(new[] { item, value },
                        Expression.replacedign(tc, Expression.Call(null, td_mi_get_converter, Expression.Constant(x.PropertyType))),
                        Expression.IfThen(
                            Expression.Call(d, d_mi_try_get_value, Expression.Constant(x.Name), item),
                            Expression.IfThen(
                                Expression.NotEqual(item, Expression.Constant(null)),
                                Expression.IfThen(
                                    Expression.Call(tc, tc_mi_can_convert_from, Expression.Constant(typeof(String))),
                                    Expression.Block(
                                        Expression.replacedign(value, Expression.Convert(Expression.Call(tc, tc_mi_convert_from, item), x.PropertyType)),
                                        Expression.Return(target, value, x.PropertyType))))),
                        Expression.Label(target, value)
                    ));
                }).ToArray();

            var body = Expression.Block(new[] { o, tc },
                Expression.MemberInit(o_new, binds)
            );

            return Expression.Lambda<Func<Dictionary<string, string>, T>>(body, d)
                .Compile();
        }

void OnData(string pattern, string key, object data)
            {
                var regkey = pattern == null ? key : $"{_psub_regkey_prefix}{pattern}";
                if (_registers.TryGetValue(regkey, out var tryval) == false) return;
                var multirecvs = tryval.Values.OrderBy(a => a.RegTime).ToArray(); //Execute in order
                foreach (var recv in multirecvs)
                    recv.Handler(pattern, key, data);
            }

public StreamsEntryResult[] XRead(long count, long block, Dictionary<string, string> keyIds)
        {
            var kikeys = keyIds.Keys.ToArray();
            return Call("XREAD".SubCommand(null)
                .InputIf(count != 0, "COUNT", count)
                .InputIf(block > 0, "BLOCK", block)
                .InputRaw("STREAMS")
                .InputKey(kikeys)
                .Input(keyIds.Values.ToArray()), rt => rt.ThrowOrValueToXRead());
        }

public StreamsEntryResult[] XReadGroup(string group, string consumer, long count, long block, bool noack, Dictionary<string, string> keyIds)
        {
            var kikeys = keyIds.Keys.ToArray();
            return Call("XREADGROUP"
                .Input("GROUP", group, consumer)
                .InputIf(count != 0, "COUNT", count)
                .InputIf(block > 0, "BLOCK", block)
                .InputIf(noack, "NOACK")
                .InputRaw("STREAMS")
                .InputKey(kikeys)
                .Input(keyIds.Values.ToArray()), rt => rt.ThrowOrValueToXRead());
        }

static object[] PrepareCmd(string cmd, string subcmd = null, params object[] parms)
		{
			if (string.IsNullOrWhiteSpace(cmd)) throw new ArgumentNullException("Redis command not is null or empty.");
			object[] args = null;
			if (parms?.Any() != true)
			{
				if (string.IsNullOrWhiteSpace(subcmd) == false) args = new object[] { cmd, subcmd };
				else args = cmd.Split(' ').Where(a => string.IsNullOrWhiteSpace(a) == false).ToArray();
			}
			else
			{
				var issubcmd = string.IsNullOrWhiteSpace(subcmd) == false;
				args = new object[parms.Length + 1 + (issubcmd ? 1 : 0)];
				var argsIdx = 0;
				args[argsIdx++] = cmd;
				if (issubcmd) args[argsIdx++] = subcmd;
				foreach (var prm in parms) args[argsIdx++] = prm;
			}
			return args;
		}

public static List<int> OrderPaiLord(List<int> paiarr)
        {
            List<int> _tempList = new List<int>(paiarr);
            for (int i = 0; i < _tempList.Count; i++)
            {
                if (_tempList[i] > 100) _tempList[i] %= 100;
            }
            int[] temparr = _tempList.ToArray<int>();
            Array.Sort<int>(temparr);
            List<int> _ASCList = temparr.ToList<int>();
            _ASCList.Reverse();//默认是升序反转一下就降序了
            return _ASCList;
        }

public CommandPacket InputIf(bool condition, params object[] args)
        {
            if (condition && args != null)
            {
                foreach (var item in args)
                {
                    if (item is object[] objs) _input.AddRange(objs);
                    else if (item is string[] strs) _input.AddRange(strs.Select(a => (object)a));
                    else if (item is int[] ints) _input.AddRange(ints.Select(a => (object)a));
                    else if (item is long[] longs) _input.AddRange(longs.Select(a => (object)a));
                    else if (item is KeyValuePair<string, long>[] kvps1) _input.AddRange(kvps1.Select(a => new object[] { a.Key, a.Value }).SelectMany(a => a).ToArray());
                    else if (item is KeyValuePair<string, string>[] kvps2) _input.AddRange(kvps2.Select(a => new object[] { a.Key, a.Value }).SelectMany(a => a).ToArray());
                    else if (item is Dictionary<string, long> dict1) _input.AddRange(dict1.Select(a => new object[] { a.Key, a.Value }).SelectMany(a => a).ToArray());
                    else if (item is Dictionary<string, string> dict2) _input.AddRange(dict2.Select(a => new object[] { a.Key, a.Value }).SelectMany(a => a).ToArray());
                    else _input.Add(item);
                }
            }
            return this;
        }

public List<TValue> GetAll() => _dic.Keys.ToArray().Select(a => Get(a)).ToList();

public TKey[] GetKeys(Func<TValue, bool> filter = null)
        {
            if (filter == null) return _dic.Keys.ToArray();
            return _dic.Keys.ToArray().Where(key => _dic.TryGetValue(key, out var item) && filter(item.value)).ToArray();
        }

public object[] EndPipe()
            {
                if (_commands.Any() == false) return new object[0];

                try
                {
                    switch (UseType)
                    {
                        case UseType.Pooling: break;
                        case UseType.Cluster: return ClusterEndPipe();
                        case UseType.Sentinel:
                        case UseType.SingleInside: break;
                        case UseType.SingleTemp: break;
                    }

                    CommandPacket epcmd = "EndPipe";
                    return TopOwner.LogCall(epcmd, () =>
                    {
                        using (var rds = _baseAdapter.GetRedisSocket(null))
                        {
                            EndPipe(rds, _commands);
                        }
                        return _commands.Select(a => a.Result).ToArray();
                    });
                }
                finally
                {
                    Dispose();
                }

                object[] ClusterEndPipe()
                {
                    throw new NotSupportedException();
                }
            }

public void ClientTracking(bool on_off, long? redirect, string[] prefix, bool bcast, bool optin, bool optout, bool noloop) => Call("CLIENT"
            .SubCommand("TRACKING")
            .InputIf(on_off, "ON")
            .InputIf(!on_off, "OFF")
            .InputIf(redirect != null, "REDIRECT", redirect)
            .InputIf(prefix?.Any() == true, prefix?.Select(a => new[] { "PREFIX", a }).SelectMany(a => a).ToArray())
            .InputIf(bcast, "BCAST")
            .InputIf(optin, "OPTIN")
            .InputIf(optout, "OPTOUT")
            .InputIf(noloop, "NOLOOP"), rt => rt.ThrowOrNothing());

public void Dispose()
            {
                _stoped = true;
                Cancel(_cancels.Keys.ToArray());
            }

internal void Cancel(params Guid[] ids)
            {
                if (ids == null) return;
                var readyUnsubInterKeys = new List<string>();
                foreach (var id in ids)
                {
                    if (_cancels.TryRemove(id, out var oldkeys))
                        foreach (var oldkey in oldkeys)
                        {
                            if (_registers.TryGetValue(oldkey, out var oldrecvs) &&
                                oldrecvs.TryRemove(id, out var oldrecv) &&
                                oldrecvs.Any() == false)
                                readyUnsubInterKeys.Add(oldkey);
                        }
                }
                var unsub = readyUnsubInterKeys.Where(a => !a.StartsWith(_psub_regkey_prefix)).ToArray();
                var punsub = readyUnsubInterKeys.Where(a => a.StartsWith(_psub_regkey_prefix)).Select(a => a.Replace(_psub_regkey_prefix, "")).ToArray();
                if (unsub.Any()) Call("UNSUBSCRIBE".Input(unsub));
                if (punsub.Any()) Call("PUNSUBSCRIBE".Input(punsub));

                if (!_cancels.Any())
                    lock (_lock)
                        if (!_cancels.Any())
                            _redisSocket?.ReleaseSocket();
            }

internal void UnSubscribe(bool punsub, string[] channels)
            {
                channels = channels?.Distinct().Select(a => punsub ? $"{_psub_regkey_prefix}{a}" : a).ToArray();
                if (channels.Any() != true) return;
                var ids = channels.Select(a => _registers.TryGetValue(a, out var tryval) ? tryval : null).Where(a => a != null).SelectMany(a => a.Keys).Distinct().ToArray();
                Cancel(ids);
            }

internal IDisposable Subscribe(bool psub, string[] channels, Action<string, string, object> handler)
            {
                if (_stoped) return new PubSubSubscribeDisposable(this, null);
                channels = channels?.Distinct().Where(a => !string.IsNullOrEmpty(a)).ToArray(); //In case of external modification
                if (channels?.Any() != true) return new PubSubSubscribeDisposable(this, null);

                var id = Guid.NewGuid();
                var time = DateTime.Now;
                var regkeys = channels.Select(a => psub ? $"{_psub_regkey_prefix}{a}" : a).ToArray();
                for (var a = 0; a < regkeys.Length; a++)
                {
                    ConcurrentDictionary<Guid, RegisterInfo> dict = null;
                    lock (_lock) dict = _registers.GetOrAdd(regkeys[a], k1 => new ConcurrentDictionary<Guid, RegisterInfo>());
                    dict.TryAdd(id, new RegisterInfo(id, handler, time));
                }
                lock (_lock)
                    _cancels.TryAdd(id, regkeys);
                var isnew = false;
                if (IsSubscribed == false)
                {
                    lock (_lock)
                    {
                        if (IsSubscribed == false)
                        {
                            _redisSocket = _topOwner.Adapter.GetRedisSocket(null);
                            IsSubscribed = isnew = true;
                        }
                    }
                }
                if (isnew)
                {
                    new Thread(() =>
                    {
                        _redisSocketReceiveTimeoutOld = _redisSocket.ReceiveTimeout;
                        _redisSocket.ReceiveTimeout = TimeSpan.Zero;
                        var timer = new Timer(state =>
                        {
                            _topOwner.Adapter.Refersh(_redisSocket); //防止 IdleBus 超时回收
                            try { _redisSocket.Write("PING"); } catch { }
                        }, null, 10000, 10000);
                        var readCmd = "PubSubRead".SubCommand(null).FlagReadbytes(false);
                        while (_stoped == false)
                        {
                            RedisResult rt = null;
                            try
                            {
                                rt = _redisSocket.Read(readCmd);
                            }
                            catch
                            {
                                Thread.CurrentThread.Join(100);
                                if (_cancels.Any()) continue;
                                break;
                            }
                            var val = rt.Value as object[];
                            if (val == null) continue; //special case

                            var val1 = val[0].ConvertTo<string>();
                            switch (val1)
                            {
                                case "pong":
                                case "punsubscribe":
                                case "unsubscribe":
                                    continue;
                                case "pmessage":
                                    OnData(val[1].ConvertTo<string>(), val[2].ConvertTo<string>(), val[3]);
                                    continue;
                                case "message":
                                    OnData(null, val[1].ConvertTo<string>(), val[2]);
                                    continue;
                            }
                        }
                        timer.Dispose();
                        lock (_lock)
                        {
                            IsSubscribed = false;
                            _redisSocket.ReceiveTimeout = _redisSocketReceiveTimeoutOld;
                            _redisSocket.ReleaseSocket();
                            _redisSocket.Dispose();
                            _redisSocket = null;
                        }
                    }).Start();
                }
                Call((psub ? "PSUBSCRIBE" : "SUBSCRIBE").Input(channels));
                return new PubSubSubscribeDisposable(this, () => Cancel(id));
            }

internal T DeserializeRedisValue<T>(byte[] valueRaw, Encoding encoding)
        {
            if (valueRaw == null) return default(T);
            var type = typeof(T);
            var typename = type.ToString().TrimEnd(']');
            if (typename == "System.Byte[") return (T)Convert.ChangeType(valueRaw, type);
            if (typename == "System.String") return (T)Convert.ChangeType(encoding.GetString(valueRaw), type);
            if (typename == "System.Boolean[") return (T)Convert.ChangeType(valueRaw.Select(a => a == 49).ToArray(), type);
            if (valueRaw.Length == 0) return default(T);

            string valueStr = null;
            if (type.IsValueType)
            {
                valueStr = encoding.GetString(valueRaw);
                bool isNullable = typename.StartsWith("System.Nullable`1[");
                var basename = isNullable ? typename.Substring(18) : typename;

                bool isElse = false;
                object obj = null;
                switch (basename)
                {
                    case "System.Boolean":
                        if (valueStr == "1") obj = true;
                        else if (valueStr == "0") obj = false;
                        break;
                    case "System.Byte":
                        if (byte.TryParse(valueStr, out var trybyte)) obj = trybyte;
                        break;
                    case "System.Char":
                        if (valueStr.Length > 0) obj = valueStr[0];
                        break;
                    case "System.Decimal":
                        if (Decimal.TryParse(valueStr, out var trydec)) obj = trydec;
                        break;
                    case "System.Double":
                        if (Double.TryParse(valueStr, out var trydb)) obj = trydb;
                        break;
                    case "System.Single":
                        if (Single.TryParse(valueStr, out var trysg)) obj = trysg;
                        break;
                    case "System.Int32":
                        if (Int32.TryParse(valueStr, out var tryint32)) obj = tryint32;
                        break;
                    case "System.Int64":
                        if (Int64.TryParse(valueStr, out var tryint64)) obj = tryint64;
                        break;
                    case "System.SByte":
                        if (SByte.TryParse(valueStr, out var trysb)) obj = trysb;
                        break;
                    case "System.Int16":
                        if (Int16.TryParse(valueStr, out var tryint16)) obj = tryint16;
                        break;
                    case "System.UInt32":
                        if (UInt32.TryParse(valueStr, out var tryuint32)) obj = tryuint32;
                        break;
                    case "System.UInt64":
                        if (UInt64.TryParse(valueStr, out var tryuint64)) obj = tryuint64;
                        break;
                    case "System.UInt16":
                        if (UInt16.TryParse(valueStr, out var tryuint16)) obj = tryuint16;
                        break;
                    case "System.DateTime":
                        if (DateTime.TryParse(valueStr, out var trydt)) obj = trydt;
                        break;
                    case "System.DateTimeOffset":
                        if (DateTimeOffset.TryParse(valueStr, out var trydtos)) obj = trydtos;
                        break;
                    case "System.TimeSpan":
                        if (Int64.TryParse(valueStr, out tryint64)) obj = new TimeSpan(tryint64);
                        break;
                    case "System.Guid":
                        if (Guid.TryParse(valueStr, out var tryguid)) obj = tryguid;
                        break;
                    default:
                        isElse = true;
                        break;
                }

                if (isElse == false)
                {
                    if (obj == null) return default(T);
                    return (T)obj;
                }
            }

            if (Adapter.TopOwner.DeserializeRaw != null) return (T)Adapter.TopOwner.DeserializeRaw(valueRaw, typeof(T));

            if (valueStr == null) valueStr = encoding.GetString(valueRaw);
            if (Adapter.TopOwner.Deserialize != null) return (T)Adapter.TopOwner.Deserialize(valueStr, typeof(T));
            return valueStr.ConvertTo<T>();
        }

public static string GetDescription(this Type that)
    {
        object[] attrs = null;
        try
        {
            attrs = that.GetCustomAttributes(false).ToArray(); //.net core 反射存在版本冲突问题，导致该方法异常
        }
        catch { }

        var dyattr = attrs?.Where(a => {
            return ((a as Attribute)?.TypeId as Type)?.Name == "DescriptionAttribute";
        }).FirstOrDefault();
        if (dyattr != null)
        {
            var valueProp = dyattr.GetType().GetProperties().Where(a => a.PropertyType == typeof(string)).FirstOrDefault();
            var comment = valueProp?.GetValue(dyattr, null)?.ToString();
            if (string.IsNullOrEmpty(comment) == false)
                return comment;
        }
        return null;
    }

static void Insert(StringBuilder sb, int forTime, int size) {
			var songs = Enumerable.Range(0, size).Select(a => new Song {
				Create_time = DateTime.Now,
				Is_deleted = false,
				replacedle = $"Insert_{a}",
				Url = $"Url_{a}"
			});

			//预热
			fsql.Insert(songs.First()).ExecuteAffrows();
			sugar.Insertable(songs.First()).ExecuteCommand();
			using (var db = new SongContext()) {
				//db.Configuration.AutoDetectChangesEnabled = false;
				db.Songs.AddRange(songs.First());
				db.SaveChanges();
			}
			Stopwatch sw = new Stopwatch();

			sw.Restart();
			for (var a = 0; a < forTime; a++) {
				fsql.Insert(songs).ExecuteAffrows();
			}
			sw.Stop();
			sb.AppendLine($"FreeSql Insert {size}条数据，循环{forTime}次，耗时{sw.ElapsedMilliseconds}ms");

			sw.Restart();
			for (var a = 0; a < forTime; a++) {
				using (var db = new FreeSongContext()) {
					db.Songs.AddRange(songs.ToArray());
					db.SaveChanges();
				}
			}
			sw.Stop();
			sb.AppendLine($"FreeSql.DbContext Insert {size}条数据，循环{forTime}次，耗时{sw.ElapsedMilliseconds}ms");

			sw.Restart();
			Exception sugarEx = null;
			try {
				for (var a = 0; a < forTime; a++)
					sugar.Insertable(songs.ToArray()).ExecuteCommand();
			} catch (Exception ex) {
				sugarEx = ex;
			}
			sw.Stop();
			sb.AppendLine($"SqlSugar Insert {size}条数据，循环{forTime}次，耗时{sw.ElapsedMilliseconds}ms" + (sugarEx != null ? $"成绩无效，错误：{sugarEx.Message}" : ""));

			sw.Restart();
			for (var a = 0; a < forTime; a++) {

				using (var db = new SongContext()) {
					//db.Configuration.AutoDetectChangesEnabled = false;
					db.Songs.AddRange(songs.ToArray());
					db.SaveChanges();
				}
			}
			sw.Stop();
			sb.AppendLine($"EFCore Insert {size}条数据，循环{forTime}次，耗时{sw.ElapsedMilliseconds}ms\r\n");
		}

async Task<int> DbContextBetchUpdatePrivAsync(EnreplacedyState[] ups, bool isLiveUpdate) {
			if (ups.Any() == false) return 0;
			var uplst1 = ups[ups.Length - 1];
			var uplst2 = ups.Length > 1 ? ups[ups.Length - 2] : null;

			if (_states.TryGetValue(uplst1.Key, out var lstval1) == false) return -999;
			var lstval2 = default(EnreplacedyState);
			if (uplst2 != null && _states.TryGetValue(uplst2.Key, out lstval2) == false) throw new Exception($"特别错误：更新失败，数据未被跟踪：{_fsql.GetEnreplacedyString(_enreplacedyType, uplst2.Value)}");

			var cuig1 = _fsql.CompareEnreplacedyValueReturnColumns(_enreplacedyType, uplst1.Value, lstval1.Value, true);
			var cuig2 = uplst2 != null ? _fsql.CompareEnreplacedyValueReturnColumns(_enreplacedyType, uplst2.Value, lstval2.Value, true) : null;

			List<EnreplacedyState> data = null;
			string[] cuig = null;
			if (uplst2 != null && string.Compare(string.Join(",", cuig1), string.Join(",", cuig2)) != 0) {
				//最后一个不保存
				data = ups.ToList();
				data.RemoveAt(ups.Length - 1);
				cuig = cuig2;
			} else if (isLiveUpdate) {
				//立即保存
				data = ups.ToList();
				cuig = cuig1;
			}

			if (data?.Count > 0) {

				if (cuig.Length == _table.Columns.Count)
					return ups.Length == data.Count ? -998 : -997;

				var updateSource = data.Select(a => a.Value).ToArray();
				var update = this.OrmUpdate(null).SetSource(updateSource).IgnoreColumns(cuig);

				var affrows = await update.ExecuteAffrowsAsync();

				foreach (var newval in data) {
					if (_states.TryGetValue(newval.Key, out var tryold))
						_fsql.MapEnreplacedyValue(_enreplacedyType, newval.Value, tryold.Value);
					if (newval.OldValue != null)
						_fsql.MapEnreplacedyValue(_enreplacedyType, newval.Value, newval.OldValue);
				}
				return affrows;
			}

			//等待下次对比再保存
			return 0;
		}