C# and WPF tutorial files

WPF/03-TreeViewsSimpleViewModel/WpfTreeView/MainWindow.xaml.cs

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+using System.Collections.Generic;
+using System.IO;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace WpfTreeView
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        #region Constructor
+
+        /// <summary>
+        /// Default constructor
+        /// </summary>
+        public MainWindow()
+        {
+            InitializeComponent();
+
+            this.DataContext = new DirectoryStructureViewModel();
+        }
+
+        #endregion
+    }
+}