What Are Lambda Expressions?

To work with LINQ, we need to be comfortable with delegates and lambda expressions. Let’s learn about them, starting with delegates.

What are delegates?

A delegate is a variable that references a method instead of a value or an object. In LINQ, Func and Action are the two built-in delegate types. We will be using Func a lot with LINQ.

The difference between Func and Action is the return type of the method they point to. The Action type references a void method. In other words, it references a method without return type. Conversely, Func references a method with a return type.

Let’s look at some Func and Action declarations.

• Action<Movie> holds a method that receives Movie as a parameter and

...