C# - Respond To Descendent Class PropertyChanged Event?

I have a class, BaseSample, that uses another class, MainData, as one of its fields:

Protected _sampleData As MainData
Public Property SampleData() As MainData
Get

[code]....

MainData in turn has a collection of a class, ProcessData, as a field and ProcessData has a collection of a class, Measurement, as a field. I.e.:

MainData
|- IEnumerable (Of ProcessData)
|- IEnumerable (Of Measurement)

These classes are entities in a LINQ to SQL file. In the Measurement class, I raise the PropertyChanged event when the CrucibleOxidizedMass property changes:

Private Sub OnCrucibleOxidizedMassChanged()
RaiseEvent PropertyChanged(Me, New ComponentModel.PropertyChangedEventArgs("CrucibleOxidizedMass"))
End Sub

In the BaseSample class, I want to respond to the CrucibleOxidizedMass PropertyChanged event in any of the descendent Measurment instances. How would I do this?