Index: Ringtoets/Common/src/Ringtoets.Common.IO/SoilProfile/SoilLayer2DLoop.cs
===================================================================
diff -u -r7585d2fd78627d94d55ffa16423af90a91e4efd4 -r0ae39cf7e804cdb6d5932d8d5aeced1e54febb60
--- Ringtoets/Common/src/Ringtoets.Common.IO/SoilProfile/SoilLayer2DLoop.cs	(.../SoilLayer2DLoop.cs)	(revision 7585d2fd78627d94d55ffa16423af90a91e4efd4)
+++ Ringtoets/Common/src/Ringtoets.Common.IO/SoilProfile/SoilLayer2DLoop.cs	(.../SoilLayer2DLoop.cs)	(revision 0ae39cf7e804cdb6d5932d8d5aeced1e54febb60)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using System.Linq;
 using Core.Common.Base.Geometry;
 using Ringtoets.Common.IO.Properties;
 
@@ -33,9 +34,15 @@
         /// <summary>
         /// Creates a new instance of <see cref="SoilLayer2DLoop"/>.
         /// </summary>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="segments"/> is <c>null</c>.</exception>
         /// <exception cref="ArgumentException">Thrown when <paramref name="segments"/> do not form a loop.</exception>
         public SoilLayer2DLoop(Segment2D[] segments)
         {
+            if (segments == null)
+            {
+                throw new ArgumentNullException(nameof(segments));
+            }
+
             CheckValidLoop(segments);
 
             Segments = segments;
@@ -82,5 +89,34 @@
 
             return true;
         }
+
+        private bool Equals(SoilLayer2DLoop other)
+        {
+            return Segments.SequenceEqual(other.Segments);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != GetType()) return false;
+
+            return Equals((SoilLayer2DLoop) obj);
+        }
+
+        public override int GetHashCode()
+        {
+            unchecked
+            {
+                var hashCode = 0;
+
+                foreach (Segment2D segment in Segments)
+                {
+                    hashCode = (hashCode * 397) ^ segment.GetHashCode();
+                }
+
+                return hashCode;
+            }
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/SoilProfile/SoilLayer2DGeometryReaderTest.cs
===================================================================
diff -u -r7585d2fd78627d94d55ffa16423af90a91e4efd4 -r0ae39cf7e804cdb6d5932d8d5aeced1e54febb60
--- Ringtoets/Common/test/Ringtoets.Common.IO.Test/SoilProfile/SoilLayer2DGeometryReaderTest.cs	(.../SoilLayer2DGeometryReaderTest.cs)	(revision 7585d2fd78627d94d55ffa16423af90a91e4efd4)
+++ Ringtoets/Common/test/Ringtoets.Common.IO.Test/SoilProfile/SoilLayer2DGeometryReaderTest.cs	(.../SoilLayer2DGeometryReaderTest.cs)	(revision 0ae39cf7e804cdb6d5932d8d5aeced1e54febb60)
@@ -631,7 +631,7 @@
         }
 
         /// <summary>
-        /// Takes a <paramref name="str"/> and returns an <see cref="Array"/> of <see cref="byte"/>
+        /// Takes <paramref name="str"/> and returns an <see cref="Array"/> of <see cref="byte"/>
         /// which contains the same information as the original <paramref name="str"/>.
         /// </summary>
         /// <param name="str">The <see cref="string"/> to convert to an <see cref="Array"/> of 
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/SoilProfile/SoilLayer2DLoopTest.cs
===================================================================
diff -u -r7585d2fd78627d94d55ffa16423af90a91e4efd4 -r0ae39cf7e804cdb6d5932d8d5aeced1e54febb60
--- Ringtoets/Common/test/Ringtoets.Common.IO.Test/SoilProfile/SoilLayer2DLoopTest.cs	(.../SoilLayer2DLoopTest.cs)	(revision 7585d2fd78627d94d55ffa16423af90a91e4efd4)
+++ Ringtoets/Common/test/Ringtoets.Common.IO.Test/SoilProfile/SoilLayer2DLoopTest.cs	(.../SoilLayer2DLoopTest.cs)	(revision 0ae39cf7e804cdb6d5932d8d5aeced1e54febb60)
@@ -30,6 +30,17 @@
     public class SoilLayer2DLoopTest
     {
         [Test]
+        public void Constructor_SegmentsNull_ThrowsArgumentNullException()
+        {
+            // Call
+            TestDelegate test = () => new SoilLayer2DLoop(null);
+
+            // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            Assert.AreEqual("segments", paramName);
+        }
+
+        [Test]
         public void Constructor_ConnectedSegments_SetsSegments()
         {
             // Setup
@@ -95,5 +106,61 @@
             var exception = Assert.Throws<ArgumentException>(test);
             Assert.AreEqual("De segmenten van de geometrie van de laag vormen geen lus.", exception.Message);
         }
+
+        [Test]
+        public void GetHashCode_EqualLoops_AreEqual()
+        {
+            // Setup
+            SoilLayer2DLoop loopA = CreateValidLoop();
+            SoilLayer2DLoop loopB = CreateValidLoop();
+
+            // Precondition
+            Assert.AreEqual(loopA, loopB);
+            Assert.AreEqual(loopB, loopA);
+
+            // Call & Assert
+            Assert.AreEqual(loopA.GetHashCode(), loopB.GetHashCode());
+            Assert.AreEqual(loopB.GetHashCode(), loopA.GetHashCode());
+        }
+
+        [Test]
+        public void Equals_DifferentType_ReturnsFalse()
+        {
+            // Setup
+            SoilLayer2DLoop loop = CreateValidLoop();
+
+            // Call
+            bool areEqual = loop.Equals(new object());
+
+            // Assert
+            Assert.IsFalse(areEqual);
+        }
+
+        [Test]
+        public void Equals_Null_ReturnsFalse()
+        {
+            // Setup
+            SoilLayer2DLoop loop = CreateValidLoop();
+
+            // Call
+            bool areEqual = loop.Equals(null);
+
+            // Assert
+            Assert.IsFalse(areEqual);
+        }
+
+        private static SoilLayer2DLoop CreateValidLoop()
+        {
+            var pointA = new Point2D(0.0, 0.0);
+            var pointB = new Point2D(1.0, 0.0);
+
+            var segments = new[]
+            {
+                new Segment2D(pointA, pointB),
+                new Segment2D(pointB, pointA)
+            };
+
+            return new SoilLayer2DLoop(segments);
+        }
     }
 }
\ No newline at end of file