Duplicate the same web form as new one

Hi!

I need to know why my page are duplicating after a link.

For example, I have a webform1 open where there is one button. When I click this button inside of the webform1 to link to the webform2 its open normally.

When webform2 is open there is a button "go back". When I click on this button I am going back to the webform1. But Its open as new webform1 one on my browser Firefox. Its should just go back without opening a new one.

Have a look to this line please:

protected void btnWebfrmTest_Click(object sender, EventArgs e)

{

System.Diagnostics.Process.Start("http://localhost:51379/Flexit/webform2.aspx");

}

Thank you,

Israel.