Index: src/Common/SharpMap/Layers/Layer.cs
===================================================================
diff -u -r8f6ae890fed8e8eae3a32f9c0498a10f82e0ddf9 -rd505e5545e25721aee2dfb60bc2a27ab1878a0ad
--- src/Common/SharpMap/Layers/Layer.cs	(.../Layer.cs)	(revision 8f6ae890fed8e8eae3a32f9c0498a10f82e0ddf9)
+++ src/Common/SharpMap/Layers/Layer.cs	(.../Layer.cs)	(revision d505e5545e25721aee2dfb60bc2a27ab1878a0ad)
@@ -23,7 +23,6 @@
 using System.Drawing.Imaging;
 using System.Linq;
 using DelftTools.Utils.Aop;
-using DelftTools.Utils.Data;
 using DelftTools.Utils.Diagnostics;
 using GeoAPI.CoordinateSystems;
 using GeoAPI.CoordinateSystems.Transformations;
@@ -48,7 +47,7 @@
     /// Implement this class instead of the ILayer interface to save a lot of common code.
     /// </summary>
     [Entity(FireOnCollectionChange = false)]
-    public abstract class Layer : Unique<long>, ILayer
+    public abstract class Layer : ILayer
     {
         private static readonly ILog log = LogManager.GetLogger(typeof(Layer));