c# – 执行流程链

public void ExecuteProcessChain(string[] asProcesses,string sInRedirect,string sOutRedirect)
    {
            Process p1 = new Process();
            p1.StartInfo.UseShellExecute = false;
            p1.StartInfo.RedirectStandardOutput = true;
            p1.StartInfo.FileName = asProcesses[0];
            p1.Start();
            StreamReader sr = p1.StandardOutput;
            string s,xxx = "";
            while ((s = sr.ReadLine()) != null)
                Console.WriteLine("sdfdsfs");
                //xxx += s+"n";
            p1.StartInfo.RedirectStandardInput = true;
            p1.StartInfo.RedirectStandardOutput = false;
            p1.StartInfo.FileName = asProcesses[1];
            p1.Start();
            StreamWriter sw = p1.StandardInput;
            sw.Write(xxx);
            sw.Close();
            sr.Close();

    }

我正在尝试执行“calc | calc”,但是当我这样做时,它会卡在线上而((s = sr.ReadLine())！= null)并且只有在我关闭计算器之后代码才会继续.我需要两个计算器一起工作.你知道怎么做吗？