I am having a difficult time trying to bind my property which is of type List to my combobox through XAML.
public List MyProperty { get; set; }
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If you don't specify anything than just the path, the binding assumes as a source the container DataContext. By the way, the useful property is defined on the container (e.g. the window).
You may solve it as follows (in the xaml):
ItemsSource="{Binding Path=MyProperty, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}}"