Index: Core/Common/src/Core.Common.Base/Geometry/Math2D.cs
===================================================================
diff -u -re2892835ceb1c916be9a9122ba372858f20b981a -r0ec4972fb80e931795d6d60fc659169b558ea28d
--- Core/Common/src/Core.Common.Base/Geometry/Math2D.cs	(.../Math2D.cs)	(revision e2892835ceb1c916be9a9122ba372858f20b981a)
+++ Core/Common/src/Core.Common.Base/Geometry/Math2D.cs	(.../Math2D.cs)	(revision 0ec4972fb80e931795d6d60fc659169b558ea28d)
@@ -420,20 +420,20 @@
                 if (segment2IsPointDegenerate)
                 {
                     // Both segments can be considered Point2D
-                    return segment1.FirstPoint.Equals(segment2.FirstPoint) ?
-                               Segment2DIntersectSegment2DResult.CreateIntersectionResult(segment1.FirstPoint) :
-                               Segment2DIntersectSegment2DResult.CreateNoIntersectResult();
+                    return segment1.FirstPoint.Equals(segment2.FirstPoint)
+                               ? Segment2DIntersectSegment2DResult.CreateIntersectionResult(segment1.FirstPoint)
+                               : Segment2DIntersectSegment2DResult.CreateNoIntersectResult();
                 }
                 {
-                    return IsPointInCollinearSegment(segment1.FirstPoint, segment2) ?
-                               Segment2DIntersectSegment2DResult.CreateIntersectionResult(segment1.FirstPoint) :
-                               Segment2DIntersectSegment2DResult.CreateNoIntersectResult();
+                    return IsPointInCollinearSegment(segment1.FirstPoint, segment2)
+                               ? Segment2DIntersectSegment2DResult.CreateIntersectionResult(segment1.FirstPoint)
+                               : Segment2DIntersectSegment2DResult.CreateNoIntersectResult();
                 }
             }
 
-            return IsPointInCollinearSegment(segment2.FirstPoint, segment1) ?
-                       Segment2DIntersectSegment2DResult.CreateIntersectionResult(segment2.FirstPoint) :
-                       Segment2DIntersectSegment2DResult.CreateNoIntersectResult();
+            return IsPointInCollinearSegment(segment2.FirstPoint, segment1)
+                       ? Segment2DIntersectSegment2DResult.CreateIntersectionResult(segment2.FirstPoint)
+                       : Segment2DIntersectSegment2DResult.CreateNoIntersectResult();
         }
 
         private static bool IsPointInCollinearSegment(Point2D point, Segment2D colinearSegment)
@@ -523,7 +523,7 @@
             return splitResults;
         }
 
-        private static void EnsureLastSplitResultHasEndPointOfLine(ICollection<Point2D> subLine, IList<Segment2D> lineSegments)
+        private static void EnsureLastSplitResultHasEndPointOfLine(List<Point2D> subLine, IList<Segment2D> lineSegments)
         {
             int lastSegmentIndex = lineSegments.Count - 1;
             if (!subLine.Contains(lineSegments[lastSegmentIndex].SecondPoint))
Index: Core/Common/src/Core.Common.Controls.TreeView/TreeViewControl.cs
===================================================================
diff -u -rb0befca10e0dc13f75621e0e70de003c511114d4 -r0ec4972fb80e931795d6d60fc659169b558ea28d
--- Core/Common/src/Core.Common.Controls.TreeView/TreeViewControl.cs	(.../TreeViewControl.cs)	(revision b0befca10e0dc13f75621e0e70de003c511114d4)
+++ Core/Common/src/Core.Common.Controls.TreeView/TreeViewControl.cs	(.../TreeViewControl.cs)	(revision 0ec4972fb80e931795d6d60fc659169b558ea28d)
@@ -606,7 +606,7 @@
 
         private void RefreshChildNodes(TreeNode treeNode, TreeNodeInfo treeNodeInfo)
         {
-            IList<TreeNode> newlyAddedChildNodes = new List<TreeNode>();
+            var newlyAddedChildNodes = new List<TreeNode>();
             object[] expectedChildNodeObjects = treeNodeInfo.ChildNodeObjects != null
                                                     ? treeNodeInfo.ChildNodeObjects(treeNode.Tag)
                                                     : new object[0];
Index: Core/Common/src/Core.Common.Gui/Forms/ViewHost/DocumentViewController.cs
===================================================================
diff -u -rfbf0127601ef799db5ec78430746c6aa23eab218 -r0ec4972fb80e931795d6d60fc659169b558ea28d
--- Core/Common/src/Core.Common.Gui/Forms/ViewHost/DocumentViewController.cs	(.../DocumentViewController.cs)	(revision fbf0127601ef799db5ec78430746c6aa23eab218)
+++ Core/Common/src/Core.Common.Gui/Forms/ViewHost/DocumentViewController.cs	(.../DocumentViewController.cs)	(revision 0ec4972fb80e931795d6d60fc659169b558ea28d)
@@ -182,7 +182,7 @@
             return view;
         }
 
-        private ViewInfo GetViewInfoUsingDialog(object data, IList<ViewInfo> viewInfoList)
+        private ViewInfo GetViewInfoUsingDialog(object data, IEnumerable<ViewInfo> viewInfoList)
         {
             Type defaultViewTypeForData = GetDefaultViewTypeForData(data);
             string defaultViewName = defaultViewTypeForData != null
Index: Core/Common/test/Core.Common.Gui.Test/Commands/GuiExportHandlerTest.cs
===================================================================
diff -u -r569a286badd9b3494f5465cc2767a8cf6a77f618 -r0ec4972fb80e931795d6d60fc659169b558ea28d
--- Core/Common/test/Core.Common.Gui.Test/Commands/GuiExportHandlerTest.cs	(.../GuiExportHandlerTest.cs)	(revision 569a286badd9b3494f5465cc2767a8cf6a77f618)
+++ Core/Common/test/Core.Common.Gui.Test/Commands/GuiExportHandlerTest.cs	(.../GuiExportHandlerTest.cs)	(revision 0ec4972fb80e931795d6d60fc659169b558ea28d)
@@ -253,7 +253,7 @@
             mockRepository.ReplayAll();
 
             var dialogText = "";
-            IList<TestListViewItem> listViewItems = null;
+            List<TestListViewItem> listViewItems = null;
 
             ModalFormHandler = (name, wnd, form) =>
             {
@@ -370,7 +370,7 @@
             mockRepository.ReplayAll();
 
             var dialogText = "";
-            IList<TestListViewItem> listViewItems = null;
+            List<TestListViewItem> listViewItems = null;
 
             ModalFormHandler = (name, wnd, form) =>
             {