例如执行git pull会卡死

用BeginOutputReadLine+OutputDataReceived 就不会卡死

    private static string Execute(string workDir, string cmd, string args, ref string errInfo)
    {
        Console.WriteLine($"{cmd} {args}");

        StringBuilder errstr = new StringBuilder();
        StringBuilder outstr = new StringBuilder();
        var myProcess = new System.Diagnostics.Process();
        try
        {
            myProcess.StartInfo.UseShellExecute = false;
            myProcess.StartInfo.FileName = cmd;
            myProcess.StartInfo.CreateNoWindow = true;
            myProcess.StartInfo.Arguments = args;
            myProcess.StartInfo.RedirectStandardInput = true;
            myProcess.StartInfo.RedirectStandardOutput = true;
            myProcess.StartInfo.RedirectStandardError = true;
            myProcess.StartInfo.StandardOutputEncoding = System.Text.Encoding.UTF8;
            myProcess.StartInfo.StandardErrorEncoding = System.Text.Encoding.UTF8;
            myProcess.Start();

            myProcess.ErrorDataReceived += (object sender, DataReceivedEventArgs e) =>
            {
                Console.WriteLine(e.Data);
                errstr.AppendLine(e.Data);
            };

            myProcess.OutputDataReceived += (object sender, DataReceivedEventArgs e) =>
            {
                outstr.AppendLine(e.Data);
            };

            myProcess.BeginErrorReadLine();
            myProcess.BeginOutputReadLine();
            myProcess.WaitForExit();
            myProcess.Close();
        }
        catch (System.Exception e)
        {
            outstr.AppendLine(e.ToString());
        }

        errInfo = errstr.ToString();
        return outstr.ToString();
    }
}