Description: ICollection is a fundamental interface in the .NET framework that defines a set of methods and properties for handling non-generic collections. This interface provides a basic structure for collections, allowing developers to manage elements efficiently. Among its most notable features are the ability to determine the size of the collection, the possibility of enumerating its elements, and the implementation of synchronization methods to ensure safety in multithreaded environments. ICollection is an essential part of the collection hierarchy in .NET, as it serves as a foundation for other more specific interfaces, such as IList and IDictionary. Its design allows collections to be more flexible and reusable, facilitating data manipulation in software applications. Additionally, ICollection includes methods such as Add, Remove, and Clear, which are crucial for the dynamic management of elements in a collection. In summary, ICollection is a key interface that establishes a standard for creating and manipulating non-generic collections, promoting interoperability and consistency in data handling.