C5  2.4
The C5 Generic Collection Library for C# and CLI is a comprehensive collection library supporting lists, sets, bags, dictionaries, priority queues, (FIFO) queues, and (LIFO) stacks. C5 runs on .NET 3.5+, Silverlight 5, Windows Phone 8, Xamarin.iOS, Xamarin.Android, and Mono.
System Namespace Reference

Namespaces

namespace  Collections
 

Classes

class  SerializableAttribute
 Dummy attribute to make collections Serializable when compiled as .NET 4.0 project