要引用阿，you see
[DllImport("KERNEL32.DLL", EntryPoint="MoveFileW", SetLastError=true,
CharSet=CharSet.Unicode, ExactSpelling=true,
CallingConvention=CallingConvention.StdCall)]
public static extern bool MoveFile(String src, String dst);
public static void Main()
{
bool bl=MoveFile("y","u");
MessageBox.Show(bl.ToString());
}