string path = (".\\pa\\1\\PasMessage.dat");
            string[] linesD = File.ReadAllLines(path, Encoding.GetEncoding("GB2312"));
            Array.Resize(ref linesD, linesD.Length - 1);
            File.WriteAllLines(path, linesD, Encoding.GetEncoding("GB2312"));

程序代码：

            
string path = (".\\pa\\1\\PasMessage.dat");
string[] linesD = File.ReadAllLines(path, Encoding.GetEncoding("GB2312"));
int count = linesD.Length - 1;
string[] newlines = new string[count];
for (int i = 0; i < count; i++) {
   newlines[i] = linesD[i];
}
File.WriteAllLines(path, newlines, Encoding.GetEncoding("GB2312"));

[此贴子已经被作者于2022-8-23 13:27编辑过]