Getting class name from Object Name

I am developing a website in C# and ASP.net

My application demands of getting the class name from object name. For achieving this,
I have used a session object. The snippet is as follows:

Page1 .. (the one sending the session object)

clsCountryMaster obj = new clsCountryMaster();
Session["myObject"] = obj;

Page 2 ...(the one receiving the session object)

object masterobj = Session["myObject"];
e.InputParameters.Add("masterobj", (masterobj.GetType)Context.Items["masterdata"]);

I am getting the following error in Page 2.
The type or namespace name 'masterobj' could not be found (are you missing a using directive or an assembly reference?)

Can any body help me in this connection?

Thanks in advance.

Tags: C#, ASP.NET, Reflection