The BinaryPredicate delegate type encapsulates a method that takes two items of the same type, and returns a boolean value representating some relationship between them. For example, checking whether two items are equal or equivalent is one kind of binary predicate.

public delegate bool BinaryPredicate<T>(
	T item1,
	T item2
)

generic<typename T>
public delegate bool BinaryPredicate(
	T item1, 
	T item2
)