c# - VB.Net 'Overridable' is not valid on a member variable declaration -

i'm using several code converters produce same vb.net coding vs not except line of code:

private overridable m_products icollection(of product) 

vs states:

'overridable' not valid on member variable declaration.

the c# coding tutorial on asp.net web site at:

http://www.asp.net/web-forms/tutorials/aspnet-45/getting-started-with-aspnet-45-web-forms/create_the_data_access_layer 

vs states should remove overridable keyword. if that, break in tutorial?

this c# coding i'm running through converters:

using system.collections.generic; using system.componentmodel.dataannotations;  namespace wingtiptoys.models {     public class category     {         [scaffoldcolumn(false)]         public int categoryid { get; set; }          [required, stringlength(100), display(name = "name")]         public string categoryname { get; set; }          [display(name = "product description")]         public string description { get; set; }          public virtual icollection<product> products { get; set; }     } } 

this result of conversion:

imports system.collections.generic imports system.componentmodel.dataannotations  namespace wingtiptoys.models public class category     <scaffoldcolumn(false)> _     public property categoryid() integer                     return m_categoryid         end         set             m_categoryid = value         end set     end property     private m_categoryid integer      <required, stringlength(100), display(name := "name")> _     public property categoryname() string                     return m_categoryname         end         set             m_categoryname = value         end set     end property     private m_categoryname string      <display(name := "product description")> _     public property description() string                     return m_description         end         set             m_description = value         end set     end property     private m_description string      public overridable property products() icollection(of product)                     return m_products         end         set             m_products = value         end set     end property     private overridable m_products icollection(of product) end class end namespace 

fields cannot overridable, property can. i'm not sure why converter created backing field @ all, can use vb.net's auto properties (if using visual studio 2010 or greater). try this:

imports system.collections.generic imports system.componentmodel.dataannotations  namespace wingtiptoys.models public class category     <scaffoldcolumn(false)> _     public property categoryid integer      <required, stringlength(100), display(name := "name")> _     public property categoryname string       <display(name := "product description")> _     public property description string               public overridable property products icollection(of product) end class end namespace