/// 获取指定驱动器的空间总大小(单位为B)         /// </summary>         /// <param name="str_HardDiskName">只需输入代表驱动器的字母即可 </param>         /// <returns> </returns>         public static long GetHardDiskSpace(string str_HardDiskName)         {             long totalSize= new long();             str_HardDiskName=str_HardDiskName +":\\";             System.IO.DriveInfo[] drives = System.IO.DriveInfo.GetDrives();             foreach (System.IO.DriveInfo drive in drives)             {                 if (drive.Name == str_HardDiskName)                 {                     totalSize = drive.TotalSize;                 }             }             return totalSize;         }         /// <summary>         /// 获取指定驱动器的剩余空间总大小(单位为B)         /// </summary>         /// <param name="str_HardDiskName">只需输入代表驱动器的字母即可 </param>         /// <returns> </returns>         public static long GetHardDiskFreeSpace(string str_HardDiskName)         {             long freeSpace = new long();             str_HardDiskName = str_HardDiskName + ":\\";             System.IO.DriveInfo[] drives = System.IO.DriveInfo.GetDrives();             foreach (System.IO.DriveInfo drive in drives)             {                 if (drive.Name == str_HardDiskName)                 {                     freeSpace = drive.TotalFreeSpace;                 }             }