System.Linq.Enumerable.Repeat(string, int)

public static void OpenProjectFolder(int goBack)
    {
        var back = string.Concat(Enumerable.Repeat("/..", goBack));
        var process = new System.Diagnostics.Process();
        process.StartInfo.FileName = Application.dataPath + back + "/";
        process.StartInfo.WorkingDirectory = Application.dataPath + back + "/";
        process.Start();
    }

private static string RandomString(int length)
        {
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            return new string(Enumerable.Repeat(chars, length)
                .Select(s => s[random.Next(s.Length)]).ToArray());
        }

[Fact]
        public void ShouldIterateEnumerable()
        {
            ParameterExpression output = Expression.Parameter(typeof(List<string>), "output");
            ParameterExpression item = Expression.Variable(typeof(string), "item");
            ConstantExpression items = Expression.Constant(Enumerable.Repeat("hello world", 10));

            List<string> addedItems = new List<string>();

            ForEachExpression loop = X.ForEach(item, items,
                Expression.Call(output, nameof(List<string>.Add), null, item)
            );

            Expression
                .Lambda<Action<List<string>>>(loop, output)
                .Compile()(addedItems);

            addedItems.Count.ShouldBe(10);
            addedItems[0].ShouldBe("hello world");
        }

[TestMethod]
        public void TestLongString()
        {
            var writer = new Amf0Writer();
            var reader = new Amf0Reader();

            using (var sc = new SerializationContext())
            {
                for (int i = 0; i < 1000; i++)
                {
                    var val = string.Concat(Enumerable.Repeat(Guid.NewGuid().ToString(), 2000));
                    writer.WriteBytes(val, sc);
                    var buffer = new byte[sc.MessageLength];
                    sc.GetMessage(buffer);

                    reader.TryGetLongString(buffer, out var readValue, out var consumed);
                    replacedert.AreEqual(val, readValue);
                    replacedert.AreEqual(buffer.Length, consumed);
                }
            }

        }

[TestMethod]
        public void TestReadLongString()
        {
            var reader = new Amf0Reader();


            using (var f = new FileStream("../../../../samples/amf0/misc/longstring.amf0", FileMode.Open))
            {
                var data = new byte[f.Length];
                f.Read(data);

                replacedert.IsTrue(reader.TryGetLongString(data, out var dataRead, out var consumed));
                replacedert.AreEqual(string.Concat(Enumerable.Repeat("abc", 32767)), dataRead);
                replacedert.AreEqual(consumed, f.Length);
            }
        }

private static void WriteToConsole(string message, OutType outType = OutType.Info)
        {
            var backupBackground = Console.BackgroundColor;
            var backupForeground = Console.ForegroundColor;

            Console.BackgroundColor = OutColors[outType];
            Console.ForegroundColor = ConsoleColor.Gray;
            Console.Write($"[{outType.ToString().ToUpper()}]");
            Console.BackgroundColor = backupBackground;

            Console.ForegroundColor = OutColors[outType];
            var spaces = Enumerable.Repeat(" ", 8 - outType.ToString().Length).Aggregate((acc, item) => acc + item);
            Console.WriteLine($"{spaces}{message}");
            Console.ForegroundColor = backupForeground;
        }

public void GenerateRandomSecureKey() {
			var random = new System.Random();
			const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
			_secureKey = new string(Enumerable.Repeat(chars, 10).Select(s => s[random.Next(s.Length)]).ToArray());
		}

private static String ToString(BigInteger mantissa, int exponent, IFormatProvider provider)
		{
			if (provider == null) throw new ArgumentNullException();
			if (mantissa == null || BigDecimalNumberFormatInfo == null) { return NullString; }

			NumberFormatInfo formatProvider = NumberFormatInfo.GetInstance(provider);

			bool negativeValue = (mantissa.Sign == -1);
			bool negativeExponent = (Math.Sign(exponent) == -1);

			string result = BigInteger.Abs(mantissa).ToString();
			int absExp = Math.Abs(exponent);

			if (negativeExponent)
			{
				if (absExp > result.Length)
				{
					int zerosToAdd = Math.Abs(absExp - result.Length);
					string zeroString = string.Join(string.Empty, Enumerable.Repeat(formatProvider.NativeDigits[0], zerosToAdd));
					result = zeroString + result;
					result = result.Insert(0, formatProvider.NumberDecimalSeparator);
					result = result.Insert(0, formatProvider.NativeDigits[0]);
				}
				else
				{
					int indexOfRadixPoint = Math.Abs(absExp - result.Length);
					result = result.Insert(indexOfRadixPoint, formatProvider.NumberDecimalSeparator);
					if (indexOfRadixPoint == 0)
					{
						result = result.Insert(0, formatProvider.NativeDigits[0]);
					}
				}

				result = result.TrimEnd(new char[] { '0' });
				if (result.Last().ToString() == formatProvider.NumberDecimalSeparator)
				{
					result = result.Substring(0, result.Length - 1);
				}
			}
			else
			{
				string zeroString = string.Join(string.Empty, Enumerable.Repeat(formatProvider.NativeDigits[0], absExp));
				result += zeroString;
			}

			if (negativeExponent) // Prefix "0."
			{

			}
			if (negativeValue) // Prefix "-"
			{
				result = result.Insert(0, formatProvider.NegativeSign);
			}

			return result;


		}

protected void AddChildItems(DropDownList dropDown, List<Enreplacedy> subjects, IEnumerable<Enreplacedy> children, int depth)
		{
			foreach (var child in children)
			{
				if (child == null)
				{
					continue;
				}

				var padding = HttpUtility.HtmlDecode(string.Concat(Enumerable.Repeat(" - ", depth)));

				dropDown.Items.Add(new Lisreplacedem(string.Format("{0}{1}", padding, child.GetAttributeValue<string>("replacedle")), child.Id.ToString()));

				var childId = child.Id;

				var grandchildren = subjects.Where(s => s.GetAttributeValue<EnreplacedyReference>("parentsubject") != null && s.GetAttributeValue<EnreplacedyReference>("parentsubject").Id == childId).OrderBy(s => s.GetAttributeValue<string>("replacedle"));

				depth++;

				AddChildItems(dropDown, subjects, grandchildren, depth);

				depth--;
			}
		}

protected void AddChildItems(List<Enreplacedy> subjects, IEnumerable<Enreplacedy> children, int depth)
		{
			foreach (var child in children)
			{
				if (child == null)
				{
					continue;
				}

				var padding = HttpUtility.HtmlDecode(string.Concat(Enumerable.Repeat(" - ", depth)));

				Items.Add(new Lisreplacedem(string.Format("{0}{1}", padding, child.GetAttributeValue<string>("replacedle")), child.Id.ToString()));

				var childId = child.Id;

				var grandchildren = subjects.Where(s => s.GetAttributeValue<EnreplacedyReference>("parentsubject") != null && s.GetAttributeValue<EnreplacedyReference>("parentsubject").Id == childId).OrderBy(s => s.GetAttributeValue<string>("replacedle"));

				depth++;

				AddChildItems(subjects, grandchildren, depth);

				depth--;
			}
		}

public static string Repeat(this string text, int count)
            => string.Concat(Enumerable.Repeat(text, count));

[Fact]
        public void AddHashAddValue_Test()
        {
            var empty = BytesValue.Parser.ParseFrom(ByteString.Empty);
            var elf = new StringValue()
            {
                Value = "ELF"
            }; // Serialized: 0a03454c46
            // sha256 of empty string: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
            // sha256 of 0a03454c46: 782330156f8c9403758ed30270a3e2d59e50b8f04c6779d819b72eee02addb13
            var expected = string.Concat(
                "0000000000000000000000000000100000000000000000000000000000000000",
                "0000000000000000000000000000000000000000000000000000000000000000",
                "0000000000000000000000000000000000000000000000000000000000000000",
                "0000000000000000000000000000000000000000000000040000000000000000",
                "0000000000000000000100000000000000000000000000000000000000000000",
                "0000000000000000000000000000000000000000000000000000000000000000",
                "0000000000000000000000000000000000000000000000000000000000000000",
                "1000000000000000000000000000000000000000000000000000000800200000"
            );
            var bloom = new Bloom();
            bloom.AddSha256Hash(
                ByteArrayHelper.HexStringToByteArray("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"));
            bloom.AddSha256Hash(
                ByteArrayHelper.HexStringToByteArray("782330156f8c9403758ed30270a3e2d59e50b8f04c6779d819b72eee02addb13"));
            replacedert.Equal(expected, bloom.Data.ToHex().Replace("0x", ""));

            new Bloom(bloom).Data.ShouldBe(bloom.Data);
            // add value
            var bloom1 = new Bloom();
            bloom1.AddValue(empty);
            bloom1.AddValue(elf);
            replacedert.Equal(expected, bloom1.Data.ToHex().Replace("0x", ""));

            // Take only 12 characters (2 * 3 = 6 bytes)
            var bloom2 = new Bloom();
            var fiftyTwoZeros = string.Join("", Enumerable.Repeat("0", 52));

            // Too short
            replacedert.ThrowsAny<Exception>(() => bloom2.AddSha256Hash(ByteArrayHelper.HexStringToByteArray("e3b0c44298fc")));
            replacedert.ThrowsAny<Exception>(() => bloom2.AddSha256Hash(ByteArrayHelper.HexStringToByteArray("782330156f8c")));

            // Too long

            replacedert.ThrowsAny<Exception>(() =>
                bloom2.AddSha256Hash(ByteArrayHelper.HexStringToByteArray("e3b0c44298fc" + "00" + fiftyTwoZeros)));
            replacedert.ThrowsAny<Exception>(() =>
                bloom2.AddSha256Hash(ByteArrayHelper.HexStringToByteArray("782330156f8c" + "00" + fiftyTwoZeros)));

            // Right size
            bloom2.AddSha256Hash(ByteArrayHelper.HexStringToByteArray("e3b0c44298fc" + fiftyTwoZeros));
            bloom2.AddSha256Hash(ByteArrayHelper.HexStringToByteArray("782330156f8c" + fiftyTwoZeros));
            replacedert.Equal(expected, bloom2.Data.ToHex().Replace("0x", ""));

            // Incorrect value
            var bloom3 = new Bloom();
            bloom3.AddSha256Hash(ByteArrayHelper.HexStringToByteArray("e3b0c44298f0" + fiftyTwoZeros));
            bloom3.AddSha256Hash(ByteArrayHelper.HexStringToByteArray("782330156f80" + fiftyTwoZeros));
            replacedert.NotEqual(expected, bloom3.Data.ToHex().Replace("0x", ""));
        }

private static void Encoding(long segment, int maxLength, StringBuilder stringBuilder)
        {
            var buildStack = new Stack<string>();

            while (true)
            {
                var index = segment % SmallFlakes.elements.Length;

                buildStack.Push(SmallFlakes.elements[index]);

                segment = segment / SmallFlakes.elements.Length;

                if (segment == 0)
                {
                    break;
                }
            }

            foreach (var padLeft in Enumerable.Repeat("0", maxLength - buildStack.Count))
            {
                buildStack.Push(padLeft);
            }

            foreach (var element in buildStack)
            {
                stringBuilder.Append(element);
            }
        }

public static UnmanagedLibrary LoadUnmanagedLibrary(string libraryName)
			{
				if (string.IsNullOrWhiteSpace(libraryName))
				{
					throw new ArgumentException("A valid library name is expected.", nameof(libraryName));
				}

				// Now look: This method should ExpandPaths on LibraryPaths.
				// That being said, it should just enumerate
				// Path, AppBase, Arch, Compiler, LibraryName, Extension

				// Secondly, this method should try each /lib/x86_64-linux-gnu/libload.so.2 to load,
				// Third, this method should try EmbeddedResources,
				// Finally, this method fails, telling the user all libraryPaths searched.

				var libraryPaths = new List<string>(Platform.LibraryPaths);

				Platform.ExpandPaths(libraryPaths, "{Path}", EnumerateLibLdConf("/etc/ld.so.conf"));

				var PATHs = new List<string>();
				PATHs.Add(EnsureNotEndingSlash(Path.GetDirectoryName(replacedembly.GetExecutingreplacedembly().Location)));
				PATHs.AddRange(EnumerateLibLdPATH());
				Platform.ExpandPaths(libraryPaths, "{DllPath}", PATHs.ToArray());

				Platform.ExpandPaths(libraryPaths, "{AppBase}", EnsureNotEndingSlash(
						AppDomain.CurrentDomain.BaseDirectory));

				Platform.ExpandPaths(libraryPaths, "{LibraryName}", libraryName);

				// Platform.ExpandPaths(libraryPaths, "{Ext}", Platform.LibraryFileExtension);

				string architecture;
				string[] architecturePaths = null;
				if (Platform.Architecture == ImageFileMachine.I386 && Environment.Is64BitProcess) 
				{
					architecture = "amd64";
				}
				else {
					architecture = Enum.GetName(typeof(ImageFileMachine), Platform.Architecture).ToLower();
				}
				if (architecture == "i386") architecturePaths = new string[] { "i386", "x86" };
				if (architecture == "amd64") architecturePaths = new string[] { "amd64", "x64" };
				if (architecturePaths == null) architecturePaths = new string[] { architecture };
				Platform.ExpandPaths(libraryPaths, "{Arch}", architecturePaths);

				// Expand Compiler
				Platform.ExpandPaths(libraryPaths, "{Compiler}", Platform.Compiler);

				// Now TRY the enumerated Directories for libFile.so.*

				string traceLabel = string.Format("UnmanagedLibrary[{0}]", libraryName);

				foreach (string libraryPath in libraryPaths)
				{

				    IEnumerable<string> files;
				    if (libraryPath.Contains("/"))
				    {

				        string folder = null;
				        string filesPattern = libraryPath;
				        int filesPatternI;
				        if (-1 < (filesPatternI = filesPattern.LastIndexOf('/')))
				        {
				            folder = filesPattern.Substring(0, filesPatternI + 1);
				            filesPattern = filesPattern.Substring(filesPatternI + 1);
				        }

				        if (string.IsNullOrEmpty(folder) || !Directory.Exists(folder)) continue;

				        files = Directory.EnumerateFiles(folder, filesPattern, SearchOption.TopDirectoryOnly).ToArray();
				    }
				    else
				    {
				        files = Enumerable.Repeat(libraryPath, 1);
				    }

				    foreach (string file in files)
					{
						// Finally, I am really loading this file
						SafeLibraryHandle handle = OpenHandle(file);

						if (!handle.IsNullOrInvalid())
						{
							// This is Platform.Posix. In mono, just dlopen'ing the library doesn't work.
							// Using DllImport("__Internal", EntryPoint = "mono_dllmap_insert") to get mono on the path.
							MonoDllMapInsert(libraryName, file);

							Trace.TraceInformation(string.Format("{0} Loaded binary \"{1}\"", 
								traceLabel, file));

							return new UnmanagedLibrary(libraryName, handle);
						}
						else
						{
							Exception nativeEx = GetLastLibraryError();
							Trace.TraceInformation(string.Format("{0} Custom binary \"{1}\" not loaded: {2}", 
								traceLabel, file, nativeEx.Message));
						}
					}					
				}

				// Search ManifestResources for fileName.arch.ext
				// TODO: Enumerate ManifestResources for ZeroMQ{Arch}{Compiler}{LibraryName}{Ext}.so.*
				string resourceName = string.Format("ZeroMQ.{0}.{1}{2}", libraryName, architecture, ".so");
				string tempPath = Path.Combine(Path.GetTempPath(), resourceName);

				if (ExtractManifestResource(resourceName, tempPath))
				{
					// TODO: need syscall_chmod_execute(path); ?
					SafeLibraryHandle handle = OpenHandle(tempPath);

					if (!handle.IsNullOrInvalid())
					{
						MonoDllMapInsert(libraryName, tempPath);

						Trace.TraceInformation(string.Format("{0} Loaded binary from EmbeddedResource \"{1}\" from \"{2}\".", 
							traceLabel, resourceName, tempPath));
						
						return new UnmanagedLibrary(libraryName, handle);
					}					
					else
					{
						Trace.TraceWarning(string.Format("{0} Unable to run the extracted EmbeddedResource \"{1}\" from \"{2}\".",
							traceLabel, resourceName, tempPath));
					}
				}
				else
				{
					Trace.TraceWarning(string.Format("{0} Unable to extract the EmbeddedResource \"{1}\" to \"{2}\".",
						traceLabel, resourceName, tempPath));
				}


				var fnf404 = new StringBuilder();
				fnf404.Append(traceLabel);
				fnf404.Append(" Unable to load binary \"");
				fnf404.Append(libraryName);
				fnf404.AppendLine("\" from folders");
				foreach (string path in libraryPaths)
				{
					fnf404.Append("\t");
					fnf404.AppendLine(path);
				}
				fnf404.Append(" Also unable to load binary from EmbeddedResource \"");
				fnf404.Append(resourceName);
				fnf404.Append("\", from temporary path \"");
				fnf404.Append(tempPath);
				fnf404.Append("\". See Trace output for more information.");

				throw new FileNotFoundException(fnf404.ToString());
			}

internal string[] GetRandomUnits(UnitFamily family, Decade decade, int count, List<string> unitMods, bool useDefaultList = true)
        {
            // Count is zero, return an empty array.
            if (count < 1) return new string[0];
            
            UnitCategory category = family.GetUnitCategory();
            bool allowDifferentUnitTypes = false;
            
            switch (category)
            {
                // Units are planes or helicopters, make sure unit count does not exceed the maximum flight group size
                case UnitCategory.Helicopter:
                case UnitCategory.Plane:
                    count = Toolbox.Clamp(count, 1, Toolbox.MAXIMUM_FLIGHT_GROUP_SIZE);
                    break;
                // Units are ships or static buildings, only one unit per group (that's the law in DCS World, buddy)
                case UnitCategory.Ship:
                case UnitCategory.Static:
                    count = 1;
                    break;
                // Units are ground vehicles, allow multiple unit types in the group
                case UnitCategory.Vehicle:
                    allowDifferentUnitTypes = true;
                    break;
            }

            string[] validUnits = SelectValidUnits(family, decade, unitMods, useDefaultList);

            // Different unit types allowed in the group, pick a random type for each unit.
            if (allowDifferentUnitTypes)
            {
                List<string> selectedUnits = new List<string>();
                for (int i = 0; i < count; i++)
                    selectedUnits.Add(Toolbox.RandomFrom(validUnits));

                return selectedUnits.ToArray();
            }
            // Different unit types NOT allowed in the group, pick a random type and fill the whole array with it.
            else
            {
                string unit = Toolbox.RandomFrom(validUnits);
                return Enumerable.Repeat(unit, count).ToArray();
            }
        }

public static string CreateIndentString() => string.Concat(Enumerable.Repeat(" ", IndentSize));

public static string RandomString(int length)
        {
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[myRandom.Next(s.Length)]).ToArray());
        }

private string generateCode()
        {
            const string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            return new string(Enumerable.Repeat(chars, 30)
              .Select(s => s[_random.Next(s.Length)]).ToArray());
        }

[Fact]
        public void Ordered_lists_with_more_than_10_items_are_serialized_as_expected() =>
            replacedertToStringEquals(
                "1. Item\r\n" +
                "2. Item\r\n" +
                "3. Item\r\n" +
                "4. Item\r\n" +
                "5. Item\r\n" +
                "6. Item\r\n" +
                "7. Item\r\n" +
                "8. Item\r\n" +
                "9. Item\r\n" +
                "10. Item\r\n" +
                "11. Item\r\n",
                new MdDoreplacedent(
                    new MdOrderedList(Enumerable.Repeat("Item", 11).Select(x => new MdLisreplacedem(x)))
                )
            );

public static string GenerateReferenceID(int length)
        {
            Random random = new Random();
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray());
        }

private string alertText(string showdownSpec, int count, Dictionary<string, List<string>> replacedles)
        {
            string alertText = showdownSpec + ":" + String.Concat(Enumerable.Repeat(Environment.NewLine, 2));
            foreach(KeyValuePair<string, List<string>> entry in replacedles)
            {
                alertText += string.Format("{0}: {1}\n", entry.Key, string.Join(", ", entry.Value));
            }
            alertText += Environment.NewLine + count.ToString() + " sets genned for " + showdownSpec;
            return alertText;
        }

public static string GetRandomString(int length)
        {
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

            Random random = new Random();

            return new string(Enumerable.Repeat(chars, length)
                .Select(s => s[random.Next(s.Length)]).ToArray());
        }

public virtual string GenerateRandom(int length, string chars)
        {
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray());
        }

private static string RandomAlphanumeric(int length)
        {
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            return new string(Enumerable.Repeat(chars, length).Select(s => s[Random.Next(s.Length)]).ToArray());
        }

[Fact]
        public void ThrowsGuardException_ForLongFluentCall() {
            // https://github.com/dotnet/roslyn/issues/9795
            var code = string.Join(".", Enumerable.Repeat("M()", 1000));
            replacedert.Throws<RoslynGuardException>(
                () => CSharpRoslynGuard.Validate(code)
            );
        }

private static string TextProgress(int min, int max, int value)
        {
            if (max == value)
            {
                return $" {string.Concat(Enumerable.Repeat("▒", 10))} [{value}/{max}]";
            }
            int interval = (int)Math.Floor((double)value / (((double)max - (double)min) / (double)10));
            return $" {string.Concat(Enumerable.Repeat("▒", interval))}{string.Concat(Enumerable.Repeat("░", 10 - interval))} [{value}/{max}]";
        }

private static string NormalizeMessage(string message)
        {
            message = HttpUtility.HtmlEncode(message)
                .Replace(Environment.NewLine, "<br>");

            return Regex.Replace(
                message,
                @"(?<=\<br\>)\s+",
                match => string.Concat(Enumerable.Repeat(" ", match.Length)));
        }

public static string RandomString(int length)
        {
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789,. ";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[Utility.Random.Next(s.Length)]).ToArray());
        }

public static string RandomString(int length)
        {
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789,. ";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray());
        }

private void WriteLine(string file, string text, int count = 1, bool truncate = false)
        {
            var lines = Enumerable.Repeat(text, count).ToArray();
            var filePath = Path.Combine(_testDir, file);
            if (truncate)
            {
                File.WriteAllLines(filePath, lines);
            }
            else
            {
                File.AppendAllLines(filePath, lines);
            }
        }

[Theory]
        [InlineData(0)]
        [InlineData(1)]
        [InlineData(100)]
        public async Task InMemoryQueue_PushAndGet(int batchCount)
        {
            var secondary = new InMemoryQueue<List<string>>(10);

            var q = new AsyncBatchQueue<string>(1000,
                new long[] { batchCount },
                new Func<string, long>[] { s => 1 }, secondary);

            await q.PushSecondaryAsync(Enumerable.Repeat("a", batchCount + 1).ToList());

            var output = new List<string>();
            var getTask = q.GetNextBatchAsync(output, 10 * 1000).AsTask();
            replacedert.True(getTask.Wait(1000));
            replacedert.Equal(batchCount, output.Count);

            if (batchCount == 0)
            {
                return;
            }

            // second call should return the last item
            output.Clear();
            await q.GetNextBatchAsync(output, 100);
            replacedert.Single(output);
        }

[Theory]
        [InlineData(0)]
        [InlineData(1)]
        public void RegisterCommandLine_NoArgs(int count)
        {
            var args = Enumerable.Repeat<string>("test", count).ToArray();

            var configBuilder = new ConfigurationBuilder();
            WorkerHostBuilderExtensions.RegisterCommandLine(configBuilder, args);

            // Ensures we don't throw an IndexOutOfRangeException; no replacedert necessary.
            configBuilder.Build();
        }

public static string RandomString(int length)
        {
            Random random = new Random();
            const string chars = "HMN34P67R9TWCXYF";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray());
        }

private static string RandomString(int length)
        {
            Random random = new Random();
            const string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray());
        }

public static string RandomAString(int length, Random random)
        {
            const string chars = "abcdefghijklmnopqrstuvwxyz";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray());
        }

public static string RandomString(int length)
        {
            var random = new Random();
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            return new string(Enumerable.Repeat(chars, length).Select(s => s[random.Next(s.Length)]).ToArray());
        }

public static string RandomString(int length, Random random)
        {
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray());
        }

private static string RandomString(int length)
        {
            const string chars = "abcdefghijklmnopqrstuvwxyz0123456789";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray());
        }

private static string random_string(int length)
        {
            Random random = new Random();
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            return new string(Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray());
        }

public static void randomize_replacedle(this Form f)
        {
            Random rnd = new Random();
            const string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            f.Text = new string(Enumerable.Repeat(chars, rnd.Next(10, 20))
              .Select(s => s[rnd.Next(s.Length)]).ToArray());
        }

private static string random_string()
        {
            Random random = new Random();
            return new string((from s in Enumerable.Repeat<string>("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", 16)
                               select s[random.Next(s.Length)]).ToArray<char>());
        }

private string GetRandomString(int length)
        {

            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            var tempString = Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray();
            return new string(tempString);
        }

private string GetRandomString(int length)
        {
            Random random = new Random();
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            var tempString = Enumerable.Repeat(chars, length)
              .Select(s => s[random.Next(s.Length)]).ToArray();
            return new string(tempString);
        }

[Fact]
        public async Task LongText()
        {
            {
                var expected = new string('a', 10000);
                Html html = expected;
                replacedert.Equal(expected, await GetStringAsync(html));
            }
            {
                var expected = string.Concat(Enumerable.Repeat("abcdefghijkl", 5000));
                Html html = expected;
                replacedert.Equal(expected, await GetStringAsync(html));
            }
        }

[Fact]
        public async Task TextEscaping_Long()
        {
            Html html = string.Concat(Enumerable.Repeat("<>\"&'", 10000));
            var expected = string.Concat(Enumerable.Repeat("<>"&'", 10000));
            replacedert.Equal(expected, await GetStringAsync(html));
        }

[Fact]
        public void LongText()
        {
            {
                var expected = new string('a', 10000);
                Html html = expected;
                replacedert.Equal(expected, html.ToString());
            }
            {
                var expected = string.Concat(Enumerable.Repeat("abcdefghijkl", 5000));
                Html html = expected;
                replacedert.Equal(expected, html.ToString());
            }
        }

[Fact]
        public void TextEscaping_Long()
        {
            Html html = string.Concat(Enumerable.Repeat("<>\"&'", 10000));
            var expected = string.Concat(Enumerable.Repeat("<>"&'", 10000));
            replacedert.Equal(expected, html.ToString());
        }

public static string RandomString(int length)
        {
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
            return new string(Enumerable.Repeat(chars, length)
            .Select(s => s[random.Next(s.Length)]).ToArray());
        }

[Fact] public void ReturnsValueWhenGivenSingletonEnumerable()
                => Enumerable.Repeat("hi", 1).ToNullable().ShouldBe("hi");

[Fact]
            public void ThrowsWhenGivenEnumerableWithMoreThanOneItem() => new Action(() =>
                Enumerable.Repeat("hi", 2).ToNullable())
                .ShouldThrow<InvalidOperationException>();

See More Examples