wpftoolkit/ExtendedWPFToolkitSolution/Src/Samples/Modules/Samples.Modules.Button/NavigationItems/DropDownButtonNavItem.xaml.cs

using System;
using System.Windows.Controls;

namespace Samples.Modules.Button.NavigationItems
{
    /// <summary>
    /// Interaction logic for DropDownButtonNavItem.xaml
    /// </summary>
    public partial class DropDownButtonNavItem : TreeViewItem
    {
        public DropDownButtonNavItem()
        {
            InitializeComponent();
        }
    }
}