Silverlight XAML Attribute Definition Order Matters

Question

I was working with the ComboBox control and couldn\'t get the SelectedItem to be set from the property on my viewmodel. Here is the control definition:

Answer 1

The next time you have a problem similar to this and you suspect the binding might be failing because of the order. Check your output window, it displays all binding errors, So from that error you could have deduced that the ItemSource was null at time of binding the SelectedItem property