Add | Overloaded. When implemented by a class, adds all the elements in the specified collection that are not already contained in the set. |
Contains | Overloaded. When implemented by a class determines whether the set contains all of the elements of the specified ICollection. |
Remove | Overloaded. When implemented by a class, removes each element of the specified ICollection from the set. |
Retain | When implemented by a class, retains each element of the specified ICollection in the set. |