.NET C# 调用cmd.exe

void ExecuteCmd(string dir, string cmd)
{
    var process = new System.Diagnostics.Process();
    process.StartInfo.FileName = "cmd.exe";
    process.StartInfo.UseShellExecute = false;
    process.StartInfo.RedirectStandardInput = true;
    process.StartInfo.RedirectStandardOutput = true;
    process.StartInfo.RedirectStandardError = true;
    process.StartInfo.CreateNoWindow = true;
    process.StartInfo.WorkingDirectory = dir;
    process.StartInfo.Arguments = cmd;
    process.Start();
    process.StandardInput.WriteLine(cmd);
    process.StandardInput.WriteLine("exit");
    process.WaitForExit();
    process.Close();
}