Hello, everyone. I fell in the following situation: I have a main UserControl with a DataGrid (which contains List). I need to show different panels depending on properties of the selected row(object). So i've created 2 controls and included them into this main control. Main control has 2 public properties -

public List<ComplexObject> SourceList { get; set; } 

and

public ComplexObject CurrentObject { get; set; }

Pseudo-code:

<UserControl x:Name="Main">
     <DataGrid ItemsSource="{Binding SourceList}" SelectedItem="{Binding CurrentObject, Mode=TwoWay}"/>
     <Controls:RightPanelFirst Visibility="condition2"/>
     <Controls:RightPanelSecond Visibility="condition2"/>
</UserControl>

RightPanelFirst and RightPanelSecond have the following xaml:

<UserControl>
    <... content here...>
    <CheckBox IsChecked="{Binding CurrentObject.ComplexProperty.SimpleProperty1, Mode=TwoWay}">
    <CheckBox IsChecked="{Binding CurrentObject.ComplexProperty.SimpleProperty2, Mode=TwoWay}" x:Name="cbSecond">
    <TextBox IsEnabled="{Binding IsChecked, ElementName=cbSecond}"/>
</UserControl>

So, my actual steps:

1. Check both checkboxes (object values are set to true)
2. Make other actions in code behind which modify CurrentObject.
3. Then i want UI to reflect the changes, so I call NotifyPropertyChanged("CurrentObject");
4. SimpleProperty1 remains the same, but SimpleProperty2 resets to false

I have no idea why this happens, can anyone help me please? Silverlight drives me mad.