Question

I have a service that is returning a custom object called “UserSettings” In my application I want to add more properties to the “UserSettings” object so I created a new object called “MyUserSettings” that inherits from “UserSettings” now I want to populate my new object with the existing data held in “UserSettings” and the new data I have for my new properties. I do not want to have to map each property one by one to the same property in the new object like this..

_MyUserSettings.Name=_UserSettings.Name;

Is there a way or better approach to what I am doing to populate ALL the properties of the existing object into my new object in one shot??

Answer 1

Yes, you can use Copy Constructor pattern. It would give you an other benefit – you do not need public property setters so object becomes immutable.

public MyUserSettings(UserSettings baseSettings)
{
    // TODO: set all properties
}