我发现给控制台输出片段着色的最简单方法是在Windows控制台中使用ANSI转义序列。

public static int Main(string[] args)
{
    string NL          = Environment.NewLine; // shortcut
    string NORMAL      = Console.IsOutputRedirected ? "" : "\x1b[39m";
    string RED         = Console.IsOutputRedirected ? "" : "\x1b[91m";
    string GREEN       = Console.IsOutputRedirected ? "" : "\x1b[92m";
    string YELLOW      = Console.IsOutputRedirected ? "" : "\x1b[93m";
    string BLUE        = Console.IsOutputRedirected ? "" : "\x1b[94m";
    string MAGENTA     = Console.IsOutputRedirected ? "" : "\x1b[95m";
    string CYAN        = Console.IsOutputRedirected ? "" : "\x1b[96m";
    string GREY        = Console.IsOutputRedirected ? "" : "\x1b[97m";
    string BOLD        = Console.IsOutputRedirected ? "" : "\x1b[1m";
    string NOBOLD      = Console.IsOutputRedirected ? "" : "\x1b[22m";
    string UNDERLINE   = Console.IsOutputRedirected ? "" : "\x1b[4m";
    string NOUNDERLINE = Console.IsOutputRedirected ? "" : "\x1b[24m";
    string REVERSE     = Console.IsOutputRedirected ? "" : "\x1b[7m";
    string NOREVERSE   = Console.IsOutputRedirected ? "" : "\x1b[27m";

    Console.WriteLine($"This is {RED}Red{NORMAL}, {GREEN}Green{NORMAL}, {YELLOW}Yellow{NORMAL}, {BLUE}Blue{NORMAL}, {MAGENTA}Magenta{NORMAL}, {CYAN}Cyan{NORMAL}, {GREY}Grey{NORMAL}! ");
    Console.WriteLine($"This is {BOLD}Bold{NOBOLD}, {UNDERLINE}Underline{NOUNDERLINE}, {REVERSE}Reverse{NOREVERSE}! ");
}

输出:

NOBOLD代码实际上是“正常强度”。详见维基百科链接页面上的“SGR(选择图形再现)参数”部分。

重定向测试避免将转义序列输出到文件中，如果输出被重定向。如果用户有一个非黑白配色方案，它将不会被重置，但你可以使用控制台功能来保存/恢复用户的配色方案在程序的开始和结束，如果这很重要的话。

下面是一个优雅的实现，它使用了dotnet新的字符串插值特性。

[InterpolatedStringHandler]
public ref struct ConsoleInterpolatedStringHandler
{
    private static readonly Dictionary<string, ConsoleColor> colors;
    private readonly IList<Action> actions;

    static ConsoleInterpolatedStringHandler() =>
        colors = Enum.GetValues<ConsoleColor>().ToDictionary(x => x.ToString().ToLowerInvariant(), x => x);

    public ConsoleInterpolatedStringHandler(int literalLength, int formattedCount)
    {
        actions = new List<Action>();
    }

    public void AppendLiteral(string s)
    {
        actions.Add(() => Console.Write(s));
    }

    public void AppendFormatted<T>(T t)
    {
        actions.Add(() => Console.Write(t));
    }

    public void AppendFormatted<T>(T t, string format)
    {
        if (!colors.TryGetValue(format, out var color))
            throw new InvalidOperationException($"Color '{format}' not supported");

        actions.Add(() =>
        {
            Console.ForegroundColor = color;
            Console.Write(t);
            Console.ResetColor();
        });
    }

    internal void WriteLine() => Write(true);
    internal void Write() => Write(false);

    private void Write(bool newLine)
    {
        foreach (var action in actions)
            action();

        if (newLine)
            Console.WriteLine();
    }
}

要使用它，创建一个类，例如ExtendedConsole:

internal static class ExtendedConsole
{
    public static void WriteLine(ConsoleInterpolatedStringHandler builder)
    {
        builder.WriteLine();
    }

    public static void Write(ConsoleInterpolatedStringHandler builder)
    {
        builder.Write();
    }
}

然后，像这样使用它:

        var @default = "default";
        var blue = "blue";
        var green = "green";
        ExtendedConsole.WriteLine($"This should be {@default}, but this should be {blue:blue} and this should be {green:green}");

只是补充上面的答案，所有使用控制台。要改变同一行文本的颜色，可以这样写:

Console.Write("This test ");
Console.BackgroundColor = bTestSuccess ? ConsoleColor.DarkGreen : ConsoleColor.Red;
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine((bTestSuccess ? "PASSED" : "FAILED"));
Console.ResetColor();

class Program
{
    static void Main()
    {
        Console.BackgroundColor = ConsoleColor.Blue;
        Console.ForegroundColor = ConsoleColor.White;
        Console.WriteLine("White on blue.");
        Console.WriteLine("Another line.");
        Console.ResetColor();
    }
}

从这里拍的。

是的。请看这篇文章。这里有一个例子:

Console.BackgroundColor = ConsoleColor.Blue;
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine("White on blue.");

上面的注释都是可靠的响应，但是注意它们不是线程安全的。如果您正在用多个线程写入控制台，更改颜色将添加一个竞争条件，可能会产生一些奇怪的输出。不过修复起来很简单:

public class ConsoleWriter
{
    private static object _MessageLock= new object();

    public void WriteMessage(string message)
    {
        lock (_MessageLock)
        {
            Console.BackgroundColor = ConsoleColor.Red;
            Console.WriteLine(message);
            Console.ResetColor();
        }
    }
}