It seems that you have been working with ASP previously.
ASP.NET works differently, It post backs to the same page always.
If you want to move from a page to another, you can use the Response.Redirect or the Server.Transfer.
Now the case of data transfer between pages,
1) You can pass through traditional Query string
2) Via session variables (even you can put an object into session)
3) Accessing the page values while using Server.transfer
More Details can found at.
http://msdn.microsoft.com/library/de...tweenpages.asp