How to call a class
 

I have worked with asp.net for about two month and have not worked with class yet.
I have a form with 10 usercontrols who contains dropdownlists, checkboxes, textboxes and more. My client have to make a dynamic requestform to send out to his members.
This part is working fine.
After the form is sent, I want to save the viewstate in a file, so that the client can access it anytime edit it.

I found the code for saving and loading the viewstate. It is in a class.

Now I don't know how to call the class in the page_load() so that the viewstate is saved and loaded.

This is the class :

public class PersistViewStateToFileSystem : inherits Page



public ViewStateFilePath = server.MapPath("/album/myViewstate.txt")



      Protected Overloads Overrides Sub SavePageStateToPersistenceMedium(ByVal viewState As Object)

     ' serialize the view state into a base-64 encoded string

      Dim los as LosFormatter= new LosFormatter()

      Dim writer as StringWriter= new StringWriter()

      los.Serialize(writer, viewState)

      ' save the string to disk

      Dim sw as new StreamWriter(ViewStateFilePath, false)

      sw.Write(writer.ToString())

      sw.Close()

   end sub





        Protected Overloads Overrides Function LoadPageStateFromPersistenceMedium() As Object

     '   determine the file to access

      if NOT File.Exists(ViewStateFilePath)

         return nothing

      else

         ' open the file

         Dim sr as StreamReader= File.OpenText(ViewStateFilePath)

         Dim viewStateString as string = sr.ReadToEnd()

         sr.Close()

         ' deserialize the string

         Dim los as LosFormatter = new LosFormatter()

         return los.Deserialize(viewStateString)

      end if

 end Function 

end class

The code is in my aspx page.