System.Collections.Generic allow to get generic types
System.Collection.Generic
he System.Collections.Generic namespace contains interfaces and classes that define generic collections, which allow users to create strongly typed collections that provide better type safety and performance than non-generic strongly typed collections.
System.Collections.Generic
System.Collection.Genric
Using System.generic;
System.Collections.Generic namespace allow you to use generic types. in c#.
We use namespace Using System.Collection.Generic for using generic type in .net