In this chapter, we had the opportunity to test the main features that any reactive application must implement: message sending, error sending, and completing acknowledgement. We focused on plain C# programming to give the first overview of how reactive classic designs can be applied to all main application needs, such as sourcing from streams, from user input, from changeable and infinite collections.

In the following chapters, we will divert Reactive Extensions for .NET features that will give us the ability to test more complex solutions to comply with more complex reactive needs.