static void Main(string[] args)
{
    Console.ForegroundColor = ConsoleColor.Green;
    Console.WriteLine("Hello, color text!");
    Console.ForegroundColor = ConsoleColor.Red;
    Console.WriteLine("Hello, color text!");
    Console.ReadKey();
}

效果如图：

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我之前的代码如下（已过时）：

控制台应用程序字体本身不能输出带颜色的字体，所有就需要调用系统的api实现，下面是一个封装好的类，另赋调用的方法，使用起来很方便，效果如图：

封装调用系统api的类ConsoleColor.cs代码如下：

ConsoleColor.cs

在Main方法的调用代码如下：

ConsoleColor TextChange = new ConsoleColor();
Console.WriteLine("Original Colors");
Console.WriteLine("Press Enter to Begin");
Console.ReadLine();
TextChange.TextColor((int)ConsoleColor.Foreground.Green +
                     (int)ConsoleColor.Foreground.Intensity);
Console.WriteLine("THIS TEXT IS GREEN");
Console.WriteLine("Press Enter to change colors again");
Console.ReadLine();
TextChange.TextColor((int)ConsoleColor.Foreground.Red +
                     (int)ConsoleColor.Foreground.Blue +
                     (int)ConsoleColor.Foreground.Intensity);
Console.WriteLine("NOW THE TEXT IS PURPLE");
Console.WriteLine("Press Enter to change colors again");
Console.ReadLine();
TextChange.TextColor((int)ConsoleColor.Foreground.Blue +
                     (int)ConsoleColor.Foreground.Intensity +
                     (int)ConsoleColor.Background.Green +
                     (int)ConsoleColor.Background.Intensity);
Console.WriteLine("NOW THE TEXT IS BLUE AND BACKGROUND OF IT IS GREEN");
Console.WriteLine("Press Enter change everything back to normal");
Console.ReadLine();
TextChange.ResetColor();
Console.WriteLine("Back to Original Colors");
Console.WriteLine("Press Enter to Terminate");
Console.ReadLine();