Hi,

As suggested above cookies are best way for your requirement but cookies come with size limitation. Dont really know what you are trying to achieve but consider using Application object too.  You can save the value in application object. The value stored in applicaton object remains in the memory till the application is running.

But please go through the following link before working with application objects:

http://msdn.microsoft.com/en-us/magazine/cc301579.aspx

http://www.dotnetspider.com/tutorials/AspNet-Tutorial-39.aspx