# Func<>
A Func<> is a generic delegate. A Func has 0 to 16 input-parameters. It always has an output parameter.
This type of delegate can reference a method, that returns a type.
# Declaration
// This Func only takes a string as input and output type
// input, output
Func<string, string> pointer = SomeMethod;
string SomeMethod(string str)
{ }If a Method has a Func<> in its signature, you can pass in another method in the signature.
SomeOtherMethod(Func<string, string> Formater)
{ }# Action<>
Takes a method, that performs any action. But it does NOT return any type.
# Predicate<>
Points to methods, that take one parameter of any type. It always returns a boolean.