Delegates and Lambdas

A delegate is a type that represents references to methods. Modern C# uses pre-defined delegates like Action (no return) and Func (returns a value) paired with lambdas.

using System;

class Program {
    static void Main() {
        Func<int, int> square = x => x * x;
        Console.WriteLine(square(5));
    }
}

How it reads

• Func<int, int> is a delegate taking an int and returning an int
• **x => x * x** is a lambda expression performing the math operation

Cloud tip: Use Action for methods that return void (no value), and Func for methods that return a value.