What's so great about Func<> delegate?

Question

Sorry if this is basic but I was trying to pick up on .Net 3.5.

Question: Is there anything great about Func<> and it\'s 5 overloads? From the looks of it, I can

Answer 1

One thing I like about delegates is that they let me declare methods within methods like so, this is handy when you want to reuse a piece of code but you only need it within that method. Since the purpose here is to limit the scope as much as possible Func<> comes in handy.

For example:

string FormatName(string pFirstName, string pLastName) {
    Func MakeFirstUpper = (pText) => {
        return pText.Substring(0,1).ToUpper() + pText.Substring(1);
    };

    return MakeFirstUpper(pFirstName) + " " + MakeFirstUpper(pLastName);
}

It's even easier and more handy when you can use inference, which you can if you create a helper function like so:

Func Lambda(Func pFunc) {
    return pFunc;
}

Now I can rewrite my function without the Func<>:

string FormatName(string pFirstName, string pLastName) {
    var MakeFirstUpper = Lambda((string pText) => {
        return pText.Substring(0,1).ToUpper() + pText.Substring(1);
    });

    return MakeFirstUpper(pFirstName) + " " + MakeFirstUpper(pLastName);
}

Here's the code to test the method:

Console.WriteLine(FormatName("luis", "perez"));