Opportunities to use Func<> to improve code readability

Question

Today I finally "got" the Func<> delegate and saw how I could use it to make some of my less readable LINQ queries (hopefully) more readable.

Here's a simple code sample illustrating the above, in a (very) trivial example

List<int> numbers = new List<int> { 1, 5, 6, 3, 8, 7, 9, 2, 3, 4, 5, 6, };

// To get the count of those that are less than four we might write:
int lessThanFourCount = numbers.Where(n => n < 4).Count();

// But this can also be written as:
Func<int, bool> lessThanFour = n => n < 4;

int lessThanFourCount = numbers.Where(lessThanFour).Count();

Can anyone else give any examples of scenarios where they use Func<>?

(Note that I would not advocate using Func<> in a scenario as simple as that shown above, it's just an example that hopefully makes the functionality of Func<> clear.)

Answer 1

I guess there would only be a point in doing this if you were going to be reusing the Func in question in a number of places (and it involved more than trivial logic). Otherwise using the standard way seems much better and perfectly readable.