c#得到局域网共享剩余空间

[DllImport("kernel32.dll")]

        private static extern bool GetDiskFreeSpaceEx(

        string lpDirectoryName, out ulong lpFreeBytesAvailable, out ulong lpTotalNumberOfBytes, out ulong lpTotalNumberOfFreeBytes);



        /// <summary>

        /// 取得磁盘剩余空间

        /// </summary>

        /// <param name="driveDirectoryName">驱动器名</param>

        /// <returns>剩余空间</returns>

        private ulong GetFreeSpace(string driveDirectoryName)

        {

            ulong freeBytesAvailable, totalNumberOfBytes, totalNumberOfFreeBytes;

            GetDiskFreeSpaceEx(driveDirectoryName, out freeBytesAvailable, out totalNumberOfBytes, out totalNumberOfFreeBytes);

            return freeBytesAvailable;

        }

ulong u = GetFreeSpace(@"\\10.222.1.1\shares");

MessageBox.Show(u.ToString());

网上找了下只能用API得到剩余空间大小, DriveInfo类只支持本地驱动器, 不支持UNC路径.