Question

What namespace do I need to get my extension to work

Here is my Extension Method

  using System; using System.Collections.Generic; using System.Web; using System.Data;  namespace MyUtilities {     public static class DataReaderExtensions     {         public static DataTable ToDataTable(IDataReader reader)         {             DataTable table = new DataTable();             table.Load(reader);             return table;         }     } }  

When I try to use it in like this

 Session['Master'] = cust.GetCustomerOrderSummary((string)Session['CustomerNumber']).ToDataTable();  

it doesn’t work. This is .net 2.0

Answer 1

You can’t. C# 2.0 doesn’t have extension methods at all. You can use extension methods from C# 3.0 in Visual Studio 2008 targeting .NET 2.0 as described in my ‘C#/.NET versions’ article but you can’t persuade a C# 2.0 compiler to act as if it understands what extension methods are.