Odd return syntax statement

Question

I know this may sound strange but I don\'t know even how to search this syntax in internet and also I am not sure what exactly means.

So I\'ve watched over some More

Answer 1

Consider the simpler example

void Main()
{
    Console.WriteLine(Foo()); // Prints 5
}

public static int Foo()
{
    return _();

    // declare the body of _()
    int _()
    {
        return 5;
    }
}

_() is a local function declared within the method containing the return statement.