How to open a new URL in background

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C#

ASP.NET

I have a 2 web application. So if user login then he will be redirected to webapp1 and will be redirected to home.aspx.

On webapp1 home.aspx, i have to call webapp2 home.aspx in backgorund so that user session will be started there also. User will not be get to know that he is redirected to webapp2 home.aspx.

How to do that?

One of my colleague told me that it will be possible using batch file. Just mention URL there and execute it using Process.

Process process = new Process();
process.StartInfo.FileName = ConfigurationManager.AppSettings["BatchFilePath"];
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardInput = true;
process.StartInfo.RedirectStandardOutput = true;

process.StartInfo.CreateNoWindow = true;

process.Start();
//process.WaitForExit();
process.Close();

But still it is opening a new window for the webapp2 home.aspx.

Any suggestions will be appreciated.