The C# programming language provides excellent support for working with collections of data. C# includes several classes and interfaces that can help you query collections of data efficiently. The ...

When designing applications, it is important to know when to use an abstract class and when to use an interface. Although abstract classes and interfaces seem similar in some ways, there are key ...

Extension methods provide a great way for extending a class functionality -- but it's interfaces that let you use those methods anywhere you want. Extension methods let you add functionality to an ...