从另一个文件ASP.NET VB.NET调用类(Calling Class from another File ASP.NET VB.NET)

 可以说我在class1.vb中有这样的类： 
 
Public Class my_class
  Public Sub my_sub()
   Dim myvar as String
   myvar = 10
   Session("myvar") = myvar
  End Sub
End Class
 
 然后我有一个带有代码隐藏文件的ASP.NET页面，default.aspx和default.aspx.vb，我想调用my_class。 我正在做以下，但它不起作用： 
 
Imports my_app.my_class
Partial Public Class _default
   Inherits System.Web.UI.Page
 Protected Sub Page_Load(ByVal sender as Object, ByVal e as System.EventArgs) Handles Me.Load
   my_class()
 End Sub
End Class
 
 我得到一个“对非共享成员的引用需要一个对象引用” 

Lets say I have a class like this in class1.vb:
 
Public Class my_class
  Public Sub my_sub()
   Dim myvar as String
   myvar = 10
   Session("myvar") = myvar
  End Sub
End Class
 
Then I have a ASP.NET page with a code-behind file, default.aspx and default.aspx.vb and I want to call my_class. I'm doing the following, but it doesn't work:
 
Imports my_app.my_class
Partial Public Class _default
   Inherits System.Web.UI.Page
 Protected Sub Page_Load(ByVal sender as Object, ByVal e as System.EventArgs) Handles Me.Load
   my_class()
 End Sub
End Class
 
I get a "Reference to a non-shared member requires an object reference"