How do I detect a property change in 3rd party/foreign class C#

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I have a person class which has the following properties:
Id, Name,LoggedInStatus which I get from Visual Studio Intellisense.
You can image the class to be something like as shown below.
public class Person
{
public int Id { get; set; }
public string Name { get; set; }
public bool LoggedInStatus{ get; set; }
}
However, I cannot modify the Person class as it is obtained from as a dll from another project (via added reference to .csproj) and also I am not permitted to do so thus preventing me from implementing the INotifyProperyChanged approach.
I need to monitor the property LoggedInStatus for any change and take a necessary action.
Please help.

What I have tried:

Out of ideas. I don't know how to proceed.

Posted 16-Aug-18 5:23am

Member 13046192

Updated 16-Aug-18 5:47am

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Gerry Schmitz · Answer 1 · 2018-08-16T05:48:00

Solution 1

Public class MyPerson : Person, INotifyPropertyChanged

etc.

Setters don't need changing; you can call OnPropertyChanged on an instance (with or without a property name) from anywhere.

Posted 16-Aug-18 5:48am

Gerry Schmitz

Comments

Member 13046192 16-Aug-18 12:15pm

Hi. Thank you. But I still can't seem to get this. Please help. The code is as follows:
public class MyPerson : Person,INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;

[NotifyPropertyChangedInvocator]
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}

class Program
{
static void Main(string[] args)
{

MyPerson x= new MyPerson();
x.PropertyChanged += X_PropertyChanged;
x.LoggedInStatus = true;
x.LoggedInStatus = false;
x.LoggedInStatus = true;
}

private static void X_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{

}
}

Member 13046192 16-Aug-18 12:16pm

It must hit X_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e) method everytime the LoggedInStatus changes from true to false and viceversa. But it isn't.