Extension Method in C# 2.0

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          


        

Answer 1

The tags say .NET 2.0; If you are using C# 3.0 (i.e. VS 2008) and targetting .NET 2.0, you can do this by declaring the ExtensionAttribute - or (easier) just reference LINQBridge.

namespace System.Runtime.CompilerServices
{
    [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class |
        AttributeTargets.Method)]
    public sealed class ExtensionAttribute : Attribute { }
}

With this in place, extension methods will work in .NET 2.0 with C# 3.0.