API刪除檔案

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using System;using System.Runtime.InteropServices;namespace ConsoleApplication1{    class Program    {        [DllImport("kernel32.dll")]        public static extern uint DeleteFile(string fileName);        [DllImport("kernel32.dll")]        public static extern uint GetLastError();        [DllImport("kernel32.dll")]        public static extern uint FormatMessage(uint dwFlag, ref IntPtr source, uint messageId, uint languageId, ref string lpBuffer, uint size, ref IntPtr va_list);        static void Main(string[] args)        {            string str = null;            IntPtr tempptr = IntPtr.Zero;            if (DeleteFile("C:\test.txt") != 0)                Console.Write("刪除成功！");            else{                FormatMessage(0x1300, ref tempptr, GetLastError(), 0, ref str, 0, ref tempptr);                Console.Write("刪除失敗！\n失敗原因：" + str);            }        }    }}