Developing our model layer

Since we have a good idea of what the application is, the next step is to develop the business objects or model layer of this application. Let's start out by defining a few classes that would contain the data to be used throughout the app. It is recommended, for the sake of organization, to add these to a Models folder in your project.

Let's begin with a class representing a user. The class can be created as follows:

public class User 
{ 
  //NOTE: we will treat this as a unique name 
  public string Name { get; set; } 
 
  //NOTE: we'll try to use this in a secure way 
  public string Password { get; set; } 
} 

Pretty straightforward so far; let's move on to create classes representing a conversation and a message as follows:

public class Conversation 
{ 
  public string Id { get; set; } 
 
  public string UserName { get; set; } 
} 
 
public class Message 
{ 
  public string Id { get; set; } 
 
  //NOTE: the Id of a Conversation 
  public string...