Top 20 NuGet collection Packages
                Provides the ability to List items in Concurrent manner.
            
            
            
        
                Simple Extension Library for some basic and handy collection extensions.
            
            
            
        
                A double-ended queue.
            
            
            
        
                Implements a "Two-way Dictionary", one that has constant conplexity item access from both the key and the value.