C# 代码处理文件"解除锁定"

　　　　　　　cmd = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "streams64.exe") + "-d \"C:\\Users\\Dxn2\\Desktop\\致贞审计作业平台20201030.rar\"" + "&exit";
            using (Process p = new Process())
            {
                string cmdPath = System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.System), "cmd.exe");
                p.StartInfo.FileName = "cmd.exe";
                p.StartInfo.Arguments = "/c " + cmdPath;
                p.StartInfo.UseShellExecute = false;
                p.StartInfo.RedirectStandardError = true;
                p.StartInfo.RedirectStandardInput = true;
                p.StartInfo.RedirectStandardOutput = true;
                p.StartInfo.CreateNoWindow = true;
                p.StartInfo.Verb = "RunAs";
                p.Start();
                p.StandardInput.WriteLine(cmd);
                p.StandardInput.AutoFlush = true;
                output = p.StandardOutput.ReadToEnd();
                p.WaitForExit();//等待程序执行完，退出进程
                p.Close();
            }