The $.$NET frameworks provide classes that represent various types of $,$ such as list, queue, set, map, and others. Using these classes, we can easily perform operations such as insert, update, delete, sort, and search on a collection of objects. All the generic collections implement a series of generic $,$ which are also defined in this namespace. The collection is very similar to arrays, except that the size of the collection is but variable, and it can grow or decrease as elements are added or removed.