Adds an IPredicate implementing object to the PredicateExpression. This can be a Predicate derived class or a PredicateExpression. If no object is present yet in the PredicateExpression, no operator is added, otherwise the object is added with an 'And'-operator.

public IPredicateExpression Add(
	IPredicate predicateToAdd
)

Public Function Add ( 
	predicateToAdd As IPredicate
) As IPredicateExpression