***System.Diagnostics.Process调用exe之后怎么取得exe的返回值？

Question

***System.Diagnostics.Process调用exe之后怎么取得exe的返回值？ 
我写的代码如下：
Process pcs = new Process();
                pcs.StartInfo.UseShellExecute = false;
                pcs.StartInfo.RedirectStandardError = true;               
                pcs.StartInfo.FileName = "OBCSETUPSDK\\ObcSetupSDK.exe";
                pcs.StartInfo.Arguments = string.Format(stringBuilder.ToString(),
                    entryLicenseRegistry.ProductID,
                    entryLicenseRegistry.RegistryNo,
                    entryLicenseRegistry.SetupKey,
                    Environment.CurrentDirectory);
                pcs.StartInfo.RedirectStandardOutput = true;
                pcs.Start();
                pcs.WaitForExit();

Answer 1

string output = pcs.StandardOutput.ReadToEnd();
 
  
*****************************************************************************
欢迎使用CSDN论坛专用阅读器 : CSDN Reader(附全部源代码) http://www.cnblogs.com/feiyun0112/archive/2006/09/20/509783.html

Answer 2

取不出来值，为空。我把整个代码发上去请大家帮忙看看。
Process pcs = new Process();
                pcs.StartInfo.UseShellExecute = false;
                pcs.StartInfo.RedirectStandardError = true;
                pcs.StartInfo.RedirectStandardOutput = true;
                pcs.StartInfo.FileName = "OBCSETUPSDK\\ObcSetupSDK.exe";
                pcs.StartInfo.Arguments = string.Format(stringBuilder.ToString(),
                    entryLicenseRegistry.ProductID,
                    entryLicenseRegistry.RegistryNo,
                    entryLicenseRegistry.SetupKey,
                    Environment.CurrentDirectory);
                pcs.StartInfo.RedirectStandardOutput = true;
                pcs.Start();
                pcs.WaitForExit();
                //pcs.e
                StreamReader srd = pcs.StandardOutput;
                while (srd.Peek() > -1)
                {
                    int result = srd.Read();
                }