C# and WPF tutorial files

WPF/03-TreeViewsSimpleViewModel/WpfTreeView/Directory/ViewModels/DirectoryStructureViewModel.cs

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+using System.Collections.ObjectModel;
+using System.Linq;
+
+namespace WpfTreeView
+{
+    /// <summary>
+    /// The view model for the applications main Directory view
+    /// </summary>
+    public class DirectoryStructureViewModel : BaseViewModel
+    {
+        #region Public Properties
+
+        /// <summary>
+        /// A list of all directories on the machine
+        /// </summary>
+        public ObservableCollection<DirectoryItemViewModel> Items { get; set; }
+
+        #endregion
+
+        #region Constructor
+
+        /// <summary>
+        /// Default constructor
+        /// </summary>
+        public DirectoryStructureViewModel()
+        {
+            // Get the logical drives
+            var children = DirectoryStructure.GetLogicalDrives();
+
+            // Create the view models from the data
+            this.Items = new ObservableCollection<DirectoryItemViewModel>(
+                children.Select(drive => new DirectoryItemViewModel(drive.FullPath, DirectoryItemType.Drive)));
+        }
+
+        #endregion
+    }
+}