Count property vs Count() method?

Question

Working with a collection I have the two ways of getting the count of objects; Count (the property) and Count() (the method). Does anyone know what

Answer 1

Count() is there as an extension method from LINQ - Count is a property on Lists, actual .NET collection objects.

As such, Count() will almost always be slower, since it will enumerate the collection / queryable object. On a list, queue, stack etc, use Count. Or for an array - Length.