C#判断文件是否占用

        [DllImport("kernel32.dll")]
        public static extern IntPtr _lopen(string lpPathName, int iReadWrite);


        [DllImport("kernel32.dll")]
        public static extern bool CloseHandle(IntPtr hObject);


        public const int OF_READWRITE = 2;
        public const int OF_SHARE_DENY_NONE = 0x40;
        public readonly IntPtr HFILE_ERROR = new IntPtr(-1);


        public bool IsFileInUse(string vFileName)
        {
            IntPtr vHandle = _lopen(vFileName, OF_READWRITE | OF_SHARE_DENY_NONE);
            if (vHandle == HFILE_ERROR)
            {
                return true;
            }
            CloseHandle(vHandle);
            return false;
        }