Add project files.

UIX/Microsoft/Iris/IModelItem.cs

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+// Decompiled with JetBrains decompiler
+// Type: Microsoft.Iris.IModelItem
+// Assembly: UIX, Version=4.8.0.0, Culture=neutral, PublicKeyToken=ddd0da4d3e678217
+// MVID: A56C6C9D-B7F6-46A9-8BDE-B3D9B8D60B11
+// Assembly location: C:\Program Files\Zune\UIX.dll
+
+using System;
+using System.ComponentModel;
+
+namespace Microsoft.Iris
+{
+    public interface IModelItem : INotifyPropertyChanged, IModelItemOwner
+    {
+        string Description { get; set; }
+
+        bool Selected { get; set; }
+
+        Guid UniqueId { get; set; }
+    }
+}