Question

I know what a func is, but not able to understand the following piece of code:

There’s a simple property :

    public Func<DomainFacade> BusinessFacadeFactory { get; set; }

And this is how the property is set:

    this.BusinessFacadeFactory = () => new DomainFacade();

Now this way of setting the property, is it a Anonymous method or something else?

Answer 1

() => new DomainFacade() is a lambda expression

It is an unnamed method written in place of a delegate
The compiler converts it to a delegate instance

It’s real format is

(parameter)=>expression or a statement block

Since the func requires a delegate to be assigned we can write a lambda expression instead of the delegate which would internally get converted to a delegate instance.

So,

() denotes a an empty parameter

new DomainFacade(); is the expression

that internally gets converted to delegate by the compiler