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.