Index: Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Data/GeneralGrassCoverErosionOutwardsInput.cs
===================================================================
diff -u -rb2b9fdf365e70928a05c57966eeed30d9050e528 -r974fb1eadbd8a630c7a992648ad42ac85ec205b1
--- Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Data/GeneralGrassCoverErosionOutwardsInput.cs	(.../GeneralGrassCoverErosionOutwardsInput.cs)	(revision b2b9fdf365e70928a05c57966eeed30d9050e528)
+++ Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Data/GeneralGrassCoverErosionOutwardsInput.cs	(.../GeneralGrassCoverErosionOutwardsInput.cs)	(revision 974fb1eadbd8a630c7a992648ad42ac85ec205b1)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using Core.Common.Base.Data;
 using Ringtoets.Common.Data.Properties;
 using Ringtoets.Revetment.Data;
 
@@ -30,6 +31,7 @@
     /// </summary>
     public class GeneralGrassCoverErosionOutwardsInput
     {
+        private static readonly Range<int> validityRangeN = new Range<int>(1, 20);
         private int n;
 
         /// <summary>
@@ -61,9 +63,10 @@
             }
             set
             {
-                if (value < 1 || value > 20)
+                if (!validityRangeN.InRange(value))
                 {
-                    throw new ArgumentOutOfRangeException(nameof(value), Resources.N_Value_should_be_in_interval_1_20);
+                    throw new ArgumentOutOfRangeException(nameof(value), string.Format(Resources.N_Value_should_be_in_Range_0_,
+                                                                                       validityRangeN));
                 }
                 n = value;
             }