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Fires the property changed event.
protected virtual void FirePropertyChanged(string propertyName, object oldValue, object newValue)
Protected Overridable Sub FirePropertyChanged(propertyName As String, oldValue As Object, newValue As Object)
| Type | Name | Description | 
|---|---|---|
| string | propertyName | Name of the property.  | 
    
| object | oldValue | The old value.  | 
    
| object | newValue | The new value.  |