Represents the method that handles the FeatureClassChanged event.

[Visual Basic .NET]
Public Delegate Sub FeatureClassChangedEventHandler ( _
    ByVal oldClass As IFeatureClass, _
    ByVal newClass As IFeatureClass _
)

[C#]
public delegate void FeatureClassChangedEventHandler (
    IFeatureClass oldClass,
    IFeatureClass newClass
);