What is [NotifyPropertyChangedInvocator] in C# when implements INotifyPropertyChanged?

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It is a Resharper attribute from their Annotations – designed to give you warning then your code looks suspicious 🙂
Consider this:

public class Foo : INotifyPropertyChanged 
{
     public event PropertyChangedEventHandler PropertyChanged;
     
     [NotifyPropertyChangedInvocator]
     protected virtual void NotifyChanged(string propertyName) { ... }
  
     private string _name;
     public string Name {
       get { return _name; }
       set { 
             _name = value; 
             NotifyChanged("LastName");//<-- warning here
           } 
     }
   }

With the [NotifyPropertyChangedInvocator] attribute on the NotifyChanged method Resharper will give you a warning, that you are invoking the method with a (presumably) wrong value.

Because Resharper now knows that method should be called to make change notification, it will help you convert normal properties into properties with change notification:
Visual Studio Screenshot showing ReShaper suggestions

Converting it into this:

public string Name
{
  get { return _name; }
  set
  {
    if (value == _name) return;
    _name = value;
    NotifyChange("Name");
  }
}

This example is from the documentation on the [NotifyPropertyChangedInvocator] attribute found here:
enter image description here

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