Format方法详解：实例演示与常用格式说明

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication2
{
    class Sample
    {
        enum Color { Yellow = 1, Blue, Green };
        static DateTime thisDate = DateTime.Now;

        public static void Main()
        {
            // Store the output of the String.Format method in a string.
            string s = "";

            Console.Clear();

            // Format a negative integer or floating-point number in various ways.
            Console.WriteLine("Standard Numeric Format Specifiers");
            s = String.Format(
                "(C) Currency: . . . . . . . . {0:C}\n" +
                "(D) Decimal:. . . . . . . . . {0:D}\n" +
                "(E) Scientific: . . . . . . . {1:E}\n" +
                "(F) Fixed point:. . . . . . . {1:F}\n" +
                "(G) General:. . . . . . . . . {0:G}\n" +
                "    (default):. . . . . . . . {0} (default = 'G')\n" +
                "(N) Number: . . . . . . . . . {0:N}\n" +
                "(P) Percent:. . . . . . . . . {1:P}\n" +
                "(R) Round-trip: . . . . . . . {1:R}\n" +