Ensure that the type implements the INotifyPropertyChanged interface.

EnsureTypeImplementsInterface.cs

private bool ReallyTamperWith()
{
  EnsureTypeImplementsInterface();
  TamperWithPropertySetters();
  return true;
}

private void EnsureTypeImplementsInterface()
{
  if (!TypeAlreadyImplementsInterface())
  {
    InjectInterfaceImplementation();
  }
  IdentifyNotificationMethod();
}

private static bool TypeImplementsInterface(TypeDefinition typeDef)
{
  return 
    typeDef.Interfaces.Any(
      it => it.Name == "INotifyPropertyChanged") 
    ||
    (typeDef.BaseType != null 
      && TypeImplementsInterface(typeDef.BaseType.Resolve()));
}

private void InjectInterfaceImplementation()
{
  InjectInterfaceDeclaration();
  InjectEventHandler();
}