C#判断指定驱动器是否是Fat分区格式的方法

using System;using System.IO;namespace RobvanderWoude{ class IsFAT {  public static int Main( string[] args )  {   try   {    if ( args.Length == 0 )    {     return WriteError( string.Empty );    }    if ( args.Length > 1 )    {     return WriteError( "Invalid number of arguments." );    }    string drive = args[0].ToUpper( );    DriveInfo[] allDrives = DriveInfo.GetDrives( );    foreach ( DriveInfo drv in allDrives )    {     if ( drive == drv.Name.Substring( 0, 2 ) )     {      if ( drv.IsReady )      {       Console.WriteLine( drv.DriveFormat.ToUpper( ) );       if (drv.DriveFormat == "FAT" || drv.DriveFormat == "FAT32")       {        return 0;       }       else       {        return 2;       }      }      else      {       Console.WriteLine(drv.DriveType.ToString().ToUpper());       return 1;      }     }    }    return WriteError( "Invalid drive specification." );   }   catch ( Exception e )   {    // Display help text with error message    return WriteError( e );   }  }  // Code to display help and optional error message,   //by Bas van der Woude  public static int WriteError( Exception e )  {   return WriteError( e == null ? null : e.Message );  }  public static int WriteError( string errorMessage )  {   string fullpath = Environment.GetCommandLineArgs().GetValue(0).ToString();   string[] program = fullpath.Split( '//' );   string exeName = program[program.GetUpperBound(0)];   exeName = exeName.Substring(0, exeName.IndexOf('.'));   if ( string.IsNullOrEmpty( errorMessage ) == false )   {    Console.Error.WriteLine();    Console.ForegroundColor = ConsoleColor.Red;    Console.Error.Write( "ERROR: " );    Console.ForegroundColor = ConsoleColor.White;    Console.Error.WriteLine( errorMessage );    Console.ResetColor();   }   Console.Error.WriteLine();   Console.Error.WriteLine("IsFAT, Version 1.00");   Console.Error.WriteLine("Return 'errorlevel' 0 if the specified drive is FAT or FAT32 formated");   Console.Error.WriteLine();   Console.Error.Write("Usage: ");   Console.ForegroundColor = ConsoleColor.White;   Console.Error.WriteLine("{0} drive:", exeName.ToUpper());   Console.ResetColor( );   Console.Error.WriteLine();   Console.Error.WriteLine("Note: Returns 0 if FAT or FAT32, 2 if not, 1 if not ready or invalid.");   Console.Error.WriteLine();   Console.Error.WriteLine("Written by Rob van der Woude");   return 1;  } }}