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Asked: 2026-05-23T18:34:49+00:00

I use C# and Asp.Net Web Forms. I read about the way Asp.Net deal

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I use C# and Asp.Net Web Forms.

I read about the way Asp.Net deal with events for the GUI Objects using its “Delegate Model”.

I’m concerting if would make sense use “Custom Delegate Type” in other context a part of event handling.

My questions:

  • In a real world scenario when could be useful to use Delegate Types apart from event handling? Example: for validation fields in a class?

  • In which kind of architecture Custom Delegate Type best feet?

  • Pro and Cons of Delegate Type?

Thanks for your time on this!

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1 Answer

  1. Editorial Team

    • If you use LINQ to Objects at all, you’re using delegates. (If you’re using EF or something similar, then you’re using expression trees of delegate types.)

    • If you use MVC, you’re probably using expression trees too (@Html.For(x => ...))

    • If you ever start threads or tasks, you’ll be using delegates.

    Basically they’re great for representing single operations in an easily-expressible way. They can be used as an alternative to single-method interfaces, and work well for providing hooks for custom behaviour instead of using inheritance.

    Since .NET 3.5 with its Action and Func delegate families, I rarely create custom delegate types – only when it makes sense to do so on readability grounds, basically.

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