Creating a message library

We will now define a couple of message classes that we will use to send chat messages. We will create a base message class that will contain information that is shared between all types of messages. We will also create a separate project for the messages, which will be a .NET Standard library. The reason that we will create it as a separate .NET Standard library is that we can then reuse it in the app we will build in the next chapter. Proceed as follows:

1. Create a new .NET Standard 2.1 project and name it Chat.Messages.
2. Add a reference to Chat.Messages in the Chat.Functions project.
3. Create a new class in the Chat.Messages project and name it Message.
4. Add a TypeInfo property to the Message class. We will need this property later in Chapter 9, Building a Real-Time Chat Application when we will carry out serialization of the messages.
5. Add a property for Id, of the string type.
6. Add a property for Timestamp, of the DateTime type.
7. Add...