#1,151 – The Func Delegate Type

The .NET Framework includes the Func predefined delegate type, which represents the signature of a method that returns some type and accepts zero or more parameters.

Overloads of Func are :

  • delegate TResult Func<out TResult>()
  • delegate TResult Func<in T, out TResult>(T p1)
  • delegate TResult Func<in T1, in T2, out TResutl>(T1 p1, T2 p2)
  • etc…

You might define your own delegate type:

        public delegate T Merger<T>(T thing1, T thing2);

        static void MergeSomething<T>(Merger<T> someMerger, T thing1, T thing2)
        {
            T result = someMerger(thing1, thing2);
        }

However, you could instead use the Func delegate type, avoiding the definition of your own custom delegate type.

        static void MergeSomething2<T>(Func<T, T, T> someMerger, T thing1, T thing2)
        {
            T result = someMerger(thing1, thing2);
        }

Func<T,T,T> indicates that we’ll pass in a function that takes two parameters of a given type and returns a value of the same type.

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About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

One Response to #1,151 – The Func Delegate Type

  1. Bhavik says:

    very simple and easy to understand this code

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