Creating collections

There are three kind of collections supported inside the .NET Framework. In this recipe, we will be focusing on using these collections inside a .NET Standard 2.0 library. In general, collections are used to manage groups of related objects. Creating arrays of objects is a way of grouping related objects. But our focus is on using these collections, which is the second method of grouping related objects.

Getting ready

These are the three kinds of collections we have in .NET Framework: 

• System.Collections.Generic Classes
• System.Collections.Concurrent Classes
• System.Collections Classes

Let's have a look at these and their usage inside a .NET Standard 2.0 library. 

How to do it...

1. Open Visual Studio 2017.
2. Click File | New | Project and, in the New Project template dialog box, select Visual Studio Solutions under the Other Project Types node in the left-hand pane, and then Blank Solution in the right-hand pane.
3. In the Name: text box, type Chapter2.Collections as the name of the solution...