Index: dam engine/branches/Initial Source/Deltares.DamEngine.Data/Geometry/GeometryData.cs
===================================================================
diff -u -r303 -r316
--- dam engine/branches/Initial Source/Deltares.DamEngine.Data/Geometry/GeometryData.cs	(.../GeometryData.cs)	(revision 303)
+++ dam engine/branches/Initial Source/Deltares.DamEngine.Data/Geometry/GeometryData.cs	(.../GeometryData.cs)	(revision 316)
@@ -301,8 +301,20 @@
         #endregion
 
         #region remove functions
-        
+
         /// <summary>
+        /// Clears this instance.
+        /// </summary>
+        public void Clear()
+        {
+            pointDataList.Clear();
+            curveDataList.Clear();
+            surfaceDataList.Clear();
+
+            newlyEffectedPoints.Clear();
+            newlyEffectedCurves.Clear();
+        }
+        /// <summary>
         /// deletes all the Loop from IGeometryLoop.
         /// </summary>
         private void DeleteAllLoops()