List<object>.RemoveAll - How to create an appropriate Predicate

Question

This is a bit of noob question - I\'m still fairly new to C# and generics and completely new to predicates, delegates and lambda expressions...

I have a class \'Enqu

Answer 1

A predicate in T is a delegate that takes in a T and returns a bool. List.RemoveAll will remove all elements in a list where calling the predicate returns true. The easiest way to supply a simple predicate is usually a lambda expression, but you can also use anonymous methods or actual methods.

{
    List vehicles;
    // Using a lambda
    vehicles.RemoveAll(vehicle => vehicle.EnquiryID == 123);
    // Using an equivalent anonymous method
    vehicles.RemoveAll(delegate(Vehicle vehicle)
    {
        return vehicle.EnquiryID == 123;
    });
    // Using an equivalent actual method
    vehicles.RemoveAll(VehiclePredicate);
}

private static bool VehiclePredicate(Vehicle vehicle)
{
    return vehicle.EnquiryID == 123;
}