title: How to set a ComboBox header using XAML in WPF
body: <p>I've spent the last few days trying to create a header for my comboBox but I can't seem find a way. All I've found so far couldn't be implemented in my model. I have to say that I have a slim understanding on databinding which I have been doing some serious reading on.
  I created a comboBox and filled it with data from different databases. Then, I used a converter to concatenate relevant data to be displayed. Now I would like to add a header describing the name of each section. 
  Here is my XAML: 
  </p>
  
  <pre><code> &lt;Window.Resources&gt;
      &lt;local:ConcatenateFieldsMultiValueConverter x:Key="converter"/&gt;
  &lt;/Window.Resources&gt;
  &lt;ComboBox Name="PersonComboBox" HorizontalAlignment="Left" Margin="104,64,0,0" VerticalAlignment="Top" Width="465"&gt;
              &lt;ComboBox.ItemTemplate&gt;
                  &lt;DataTemplate&gt;
                      &lt;StackPanel Orientation="Horizontal"&gt;
                          &lt;CheckBox x:Name="ComboBoxCheckBox" IsChecked="{Binding IsSelected, Mode=TwoWay}"/&gt;
                          &lt;TextBlock&gt; 
                              &lt;TextBlock.Text&gt; 
                                  &lt;MultiBinding Converter="{StaticResource converter}" ConverterParameter=", "&gt;
                                      &lt;Binding Path="FirstName" /&gt;
                                      &lt;Binding Path="LastName"/&gt;
                                      &lt;Binding Path="Age"/&gt;
                                      &lt;Binding Path="Country"/&gt;
                                  &lt;/MultiBinding&gt;
                              &lt;/TextBlock.Text&gt;
                          &lt;/TextBlock&gt;
                      &lt;/StackPanel&gt;
                  &lt;/DataTemplate&gt;
              &lt;/ComboBox.ItemTemplate&gt;
    &lt;/ComboBox&gt;
  </code></pre>
  
  <p>Here is where I bound to the comboBox: 
  </p>
  
  <pre><code>    // Binds the comboBox to the personDataItems list
      this.PersonComboBox.ItemsSource = personDataItems;
  </code></pre>
  
  <p>This is how the header should look:
  <img src="https://i.stack.imgur.com/2EeqU.png" alt="enter image description here"></p>
  
  <p>I want to be able to do it using XAML. Thanks so much for your help. </p>