Combobox items does not display title in C# WPF MVVM : <p>I have main view model which contains:</p>

<pre><code>public class MainViewModel: INotifyPropertyChanged
{
   public MainViewModel() { Categories = LoadCategories(); }
   public ObservableCollection&lt;CategoryViewModel&gt; Categories {get;}
   public FileData Data {get; set;}
}

public class FileData: INotifyPropertyChanged
{
   public string Title {get {...} set {...}}
   public CategoryViewModel Category {get {...} set{...}}
}
</code></pre>

<p>and</p>

<pre><code>public class CategoryViewModel
{
   public string Title {get;set;}
   public EMyEnum Value {get;set;}
}
</code></pre>

<p>and xaml:</p>

<pre><code>&lt;ComboBox Grid.Row="2" Grid.Column="1" VerticalAlignment="Stretch" FontSize="16"
              SelectedItem="{Binding Data.Category, UpdateSourceTrigger=PropertyChanged}"
              ItemsSource="{Binding Categories}"
              DisplayMemberPath="{Binding Title}"/&gt;
</code></pre>

<p>Seems that dropdown list does not show <code>Title</code> value. In debug, the <code>Title</code> is populated and is not empty.</p>

<p>If I remove <code>DisplayMemberPath</code> then in list will display full namespace to <code>CategoryViewModel</code> class.</p>

<p>What can do here ? Where's my mistake ?</p>
