PropertyChangedEventHandler is not marked as serializable
My data-transfer-objects implement INotifyPropertyChanged, which was giving me a problem whenever I tried to serialise them over a Remoting session. If you try to add [NonSerialized] to the event you get an error informing you that you can only apply this attribute to fields, and not properties. The solution is pretty simple, I think the .NET compiler should do this by default. [NonSerialized] PropertyChangedEventHandler propertyChanged; public event PropertyChangedEventHandler PropertyChanged { add { propertyChanged += value; } remove { propertyChanged -= value; } }