Func<int,bool> (Func<T,TResult>) is a predefined delegate – a method that has an int parameter and returns a bool. The return type is always the last one in signature and is required for Func<>. And it may be the only type in signature (Func).
In other words, variable is a reference to a value, but delegate is like a reference to a method.
See this: https://docs.microsoft.com/en-us/dotnet/api/system.func-2?view=netframework-4.7.2

No, will not: http://prntscr.com/cgewti.

c#

It looks like the expected value and the returned value are reversed: http://prntscr.com/ceen54

non-static member: http://prntscr.com/bbdqyy .