C#从windows剪贴板获取并显示文本内容的方法

using System;
using System.Windows.Forms;
namespace RobvanderWoude
{
 class Paste
 {
  [STAThread]
  static int Main( string[] args )
  {
   if ( args.Length == 0 )
   {
    try
    {
     if ( Clipboard.ContainsText( ) )
     {
      string clipText = Clipboard.GetText( );
      Console.Write( clipText );
      return 0;
     }
     else
     {
      return 1;
     }
    }
    catch ( Exception e )
    {
     Console.Error.WriteLine( e.Message );
     return 2;
    }
   }
   else
   {
    Console.Error.WriteLine( );
    Console.Error.WriteLine( "Paste.exe, Version 1.01" );
    Console.Error.WriteLine( "Read and display text from the clipboard" );
    Console.Error.WriteLine( );
    Console.Error.WriteLine( "Usage: PASTE" );
    Console.Error.WriteLine( );
    Console.Error.WriteLine( "Note:  The program returns the following 'errorlevels':" );
    Console.Error.WriteLine( " 0 success" );
    Console.Error.WriteLine( " 1 no text available in clipboard" );
    Console.Error.WriteLine( " 2 command line or unknown error" );
    Console.Error.WriteLine( );
    Console.Error.WriteLine( "Written by Rob van der Woude" );
    return 2;
   }
  }
 }
}