Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SurfaceLine2.cs
===================================================================
diff -u -r955 -r1387
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SurfaceLine2.cs	(.../SurfaceLine2.cs)	(revision 955)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SurfaceLine2.cs	(.../SurfaceLine2.cs)	(revision 1387)
@@ -23,6 +23,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using Deltares.DamEngine.Data.Geometry;
+using Deltares.DamEngine.Data.Properties;
 using Deltares.DamEngine.Data.Standard;
 using Deltares.DamEngine.Data.Standard.Language;
 using Deltares.DamEngine.Data.Standard.Validation;
@@ -194,7 +195,7 @@
 
             double x = point.X;
             return (x >= startX || x.AlmostEquals(startX, GeometryPoint.Precision))
-                   && (x < endX || x.AlmostEquals(endX, GeometryPoint.Precision));
+                   && (x <= endX || x.AlmostEquals(endX, GeometryPoint.Precision));
         }
 
         /// <summary>
@@ -208,7 +209,7 @@
         {
             if (endX < startX)
             {
-                throw new ArgumentException("End value is smaller then the start value");
+                throw new ArgumentException(Resources.GetPointSegmentIncludingEndValueSmallerThanStartValue);
             }
 
             return from point in PointsOrderdByX