I want to create an instance of a Class. The problem is that i want to create this instance once when the session starts and i should have access to this instance in  my all other .aspx pages. Can anyone suggest where i should create this instance so that it will be available on all .aspx pages?

Thanks.

take a look at this for an example:

nrlahoti:

access to this instance in  my all other .aspx pages

http://www.odetocode.com/Articles/89.aspx

However being not considered as a good practice, you can either create a startup page that will always load first, or use Global.asax file as the previous poster had suggested, and then use the Session object to put some value inside of it. It works like that:

HttpContext.Session["SomeKey"] = YourObject

And it will be accessible across all page in your application.

HTH,
Andrey.