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Asked: 2026-06-04T18:18:16+00:00

I am trying to learn delegates in C# from this article http://msdn.microsoft.com/en-us/library/aa288459(v=vs.71).aspx I am

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I am trying to learn delegates in C# from this article
http://msdn.microsoft.com/en-us/library/aa288459(v=vs.71).aspx

I am able to understand the code a bit but i am not able to understand where and why would a developer want to use delegates. Can somebody give an easy scenario which can help me start with delegates?

Update
I read this statement everywhere, “The delegate object can then be passed to code which can call the referenced method, without having to know at compile time which method will be invoked.”

But why would i want compiler shouldn’t know about function i pass? I can smell abstraction here but what’s the use? Any real time scenario is required.

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1 Answer

  1. Editorial Team

    A good example of using delegates would be callbacks. Imagine you have a class DbSearcher. That class has the method Search(string q) and when you call this method it takes it 1 minute to return. You want to eventually display results of the search but you don’t want to keep the user waiting for them to appear while being unable to do anything more. What you do is you change your method to, for example, Search(string q, Action displayResults) and fire it in a separate thread. displayResults here is a delegate which you will call inside the Search method once the search results are retrieved from the db.

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