MVVM radiobuttons

Someone please help. I have an interesting issue. I am trying to implement an MVVM app and I want to bind to radiobuttons in my view. Here's my view: ``` <StackPanel Orientation="Horizontal" Grid.ColumnSpan="2" > <RadioButton GroupName="1" IsChecked="{Binding Path=NoteGeneral, Mode=TwoWay}">General</RadioButton> <RadioButton GroupName="1" IsChecked="{Binding Path=NoteContact, Mode=TwoWay}" >Contact</RadioButton> <RadioButton GroupName="1" IsChecked="{Binding Path=NoteAddress, Mode=TwoWay}" >Address</RadioButton> <RadioButton GroupName="1" IsChecked="{Binding Path=NotePhone, Mode=TwoWay}" >Phone</RadioButton> </StackPanel> ``` Here's my ViewModel: ``` bool _NoteGeneral; public bool NoteGeneral { get { return _NoteGeneral; } set { _NoteGeneral = value; OnPropertyChanged("NoteGeneral"); } } bool _NoteContact; public bool NoteContact { get { return _NoteContact; } set { _NoteContact = value; OnPropertyChanged("NoteContact"); } } bool _NoteAddress; public bool NoteAddress { get { return _NoteAddress; } set { _NoteAddress = value; OnPropertyChanged("NoteAddress"); } } bool _NotePhone; public bool NotePhone { get { return _NotePhone; } set { _NotePhone = value; OnPropertyChanged("NotePhone"); } } ``` The problem is this, when I click the different radiobuttons the property setter only gets called the first time(when i run thru debugging). e.g. When I click NoteGeneral, NoteContact, then NoteGeneral again only the first two clicks update my viewmodel. I think I might have something wrong with my binding, or maybe I'm approaching this the completely wrong way. Can anyone help? How should I implement radiobutton selections in my viewmodel? .NET 4 and Later This issue with RadioButton binding was resolved by Microsoft when .NET 4 was released. Binding of RadioButtons now works as you would expect without any of the work-arounds listed below.