Question

I am writing a class library where i need to extend System.DateTime to have a property called VendorSpecificDay such that

DateTime txnDate = DateTime.Today;

VendorSpecificDayEnum vendorDay = txnDate.VendorSpecificDay;

---

public enum VendorSpecificDayEnum
{
    Monday, Tuesday, ShoppingDay, HolidayDay
}

I realize that this is a perfect candidate for a System.Core Extension method, but the class library is in .net 2.0 ( i know i am living in dark ages )

Given that Extension methods are syntactical sugar, is there anyway i can achieve this without them ?

Many Thanks

Answer 1

If you have access to the C# 3.0 compiler in VS 2008, you can use extension methods even if your project targets .NET 2.0. Just define your own ExtensionAttribute:

namespace System.Runtime.CompilerServices
{
    public class ExtensionAttribute : Attribute { }
}

As long as that type exists in a referenced assembly, you can use the this keyword to define extension methods, and can consume them like normal.