Index: Core/Common/src/Core.Common.Utils/Core.Common.Utils.csproj
===================================================================
diff -u -r654d3a712eedbdeea718dc0448c5544f09e053cd -rc0c01906c23d8951360f8c299473e1eb92729451
--- Core/Common/src/Core.Common.Utils/Core.Common.Utils.csproj	(.../Core.Common.Utils.csproj)	(revision 654d3a712eedbdeea718dc0448c5544f09e053cd)
+++ Core/Common/src/Core.Common.Utils/Core.Common.Utils.csproj	(.../Core.Common.Utils.csproj)	(revision c0c01906c23d8951360f8c299473e1eb92729451)
@@ -107,6 +107,7 @@
       <DesignTime>True</DesignTime>
       <DependentUpon>Resources.resx</DependentUpon>
     </Compile>
+    <Compile Include="ReferenceEqualityComparer.cs" />
     <Compile Include="SettingsHelper.cs" />
     <Compile Include="Drawing\ImageExtensions.cs" />
     <Compile Include="MathUtils.cs" />
Index: Core/Common/src/Core.Common.Utils/ReferenceEqualityComparer.cs
===================================================================
diff -u
--- Core/Common/src/Core.Common.Utils/ReferenceEqualityComparer.cs	(revision 0)
+++ Core/Common/src/Core.Common.Utils/ReferenceEqualityComparer.cs	(revision c0c01906c23d8951360f8c299473e1eb92729451)
@@ -0,0 +1,21 @@
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+
+namespace Core.Common.Utils
+{
+    /// <summary>
+    /// This class determines whether two objects are equal based on their references.
+    /// </summary>
+    public class ReferenceEqualityComparer<T> : IEqualityComparer<T>
+    {
+        public bool Equals(T x, T y)
+        {
+            return ReferenceEquals(x, y);
+        }
+
+        public int GetHashCode(T obj)
+        {
+            return RuntimeHelpers.GetHashCode(obj);
+        }
+    }
+}
\ No newline at end of file
Index: Core/Common/test/Core.Common.Utils.Test/Core.Common.Utils.Test.csproj
===================================================================
diff -u -r654d3a712eedbdeea718dc0448c5544f09e053cd -rc0c01906c23d8951360f8c299473e1eb92729451
--- Core/Common/test/Core.Common.Utils.Test/Core.Common.Utils.Test.csproj	(.../Core.Common.Utils.Test.csproj)	(revision 654d3a712eedbdeea718dc0448c5544f09e053cd)
+++ Core/Common/test/Core.Common.Utils.Test/Core.Common.Utils.Test.csproj	(.../Core.Common.Utils.Test.csproj)	(revision c0c01906c23d8951360f8c299473e1eb92729451)
@@ -102,6 +102,7 @@
       <DesignTime>True</DesignTime>
       <DependentUpon>Resources.resx</DependentUpon>
     </Compile>
+    <Compile Include="ReferenceEqualityComparerTest.cs" />
     <Compile Include="Reflection\AssemblyUtilsTest.cs" />
     <Compile Include="Reflection\TypeConverterTest.cs" />
     <Compile Include="Reflection\TypeUtilsTest.cs" />
Index: Core/Common/test/Core.Common.Utils.Test/ReferenceEqualityComparerTest.cs
===================================================================
diff -u
--- Core/Common/test/Core.Common.Utils.Test/ReferenceEqualityComparerTest.cs	(revision 0)
+++ Core/Common/test/Core.Common.Utils.Test/ReferenceEqualityComparerTest.cs	(revision c0c01906c23d8951360f8c299473e1eb92729451)
@@ -0,0 +1,97 @@
+using NUnit.Framework;
+
+namespace Core.Common.Utils.Test
+{
+    [TestFixture]
+    public class ReferenceEqualityComparerTest
+    {
+        [Test]
+        public void HashCode_Object_ReturnHashCode()
+        {
+            // Setup
+            var comparer = new ReferenceEqualityComparer<object>();
+            var obj = new object();
+
+            // Call
+            var code = comparer.GetHashCode(obj);
+
+            // Assert
+            Assert.AreEqual(code, obj.GetHashCode());
+        }
+
+        [Test]
+        public void HashCode_ObjectHashCodeOverride_ReturnsObjectHashCode()
+        {
+            // Setup
+            var comparer = new ReferenceEqualityComparer<object>();
+            var obj = new TestObject();
+
+            // Call
+            var code = comparer.GetHashCode(obj);
+
+            // Assert
+            Assert.AreNotEqual(code, obj.GetHashCode());
+            Assert.AreEqual(code, obj.GetBaseHashCode());
+        }
+
+        [Test]
+        public void HashCode_DifferentInstance_ReturnDifferentHashCode()
+        {
+            // Setup
+            var comparer = new ReferenceEqualityComparer<object>();
+
+            // Call
+            var codeFirst = comparer.GetHashCode(new TestObject());
+            var codeOther = comparer.GetHashCode(new TestObject());
+
+            // Assert
+            Assert.AreNotEqual(codeFirst, codeOther);
+        }
+
+        [Test]
+        public void Equals_SameInstance_ReturnTrue() {
+            // Setup
+            var comparer = new ReferenceEqualityComparer<object>();
+            var obj = new object();
+
+            // Call & Assert
+            Assert.IsTrue(comparer.Equals(obj, obj));
+            Assert.AreEqual(comparer.GetHashCode(obj), comparer.GetHashCode(obj));
+        }
+
+        [Test]
+        public void Equals_OtherEqualsInstance_ReturnFalse()
+        {
+            // Setup
+            var comparer = new ReferenceEqualityComparer<object>();
+            var objectFirst = new TestObject();
+            var objectSecond = new TestObject();
+
+            // Call 
+            var equals = comparer.Equals(objectFirst, objectSecond);
+            
+            // Assert
+            Assert.IsFalse(equals);
+            Assert.IsTrue(objectFirst.Equals(objectSecond));
+            Assert.AreNotEqual(comparer.GetHashCode(objectFirst), comparer.GetHashCode(objectSecond));
+        }
+
+        class TestObject
+        {
+            public override bool Equals(object obj)
+            {
+                return true;
+            }
+
+            public override int GetHashCode()
+            {
+                return 1;
+            }
+
+            public int GetBaseHashCode()
+            {
+                return base.GetHashCode();
+            }
+        }
+    }
+}
\ No newline at end of file
Index: Core/Components/src/Core.Components.OxyPlot.Forms/BaseChart.cs
===================================================================
diff -u -rdaaa148db691a71c042fcdd3ca039cf13c59217c -rc0c01906c23d8951360f8c299473e1eb92729451
--- Core/Components/src/Core.Components.OxyPlot.Forms/BaseChart.cs	(.../BaseChart.cs)	(revision daaa148db691a71c042fcdd3ca039cf13c59217c)
+++ Core/Components/src/Core.Components.OxyPlot.Forms/BaseChart.cs	(.../BaseChart.cs)	(revision c0c01906c23d8951360f8c299473e1eb92729451)
@@ -1,8 +1,8 @@
 using System;
 using System.Collections.Generic;
 using System.Drawing;
-using System.Runtime.CompilerServices;
 using System.Windows.Forms;
+using Core.Common.Utils;
 using Core.Components.Charting.Data;
 using Core.Components.OxyPlot.Properties;
 using OxyPlot;
@@ -19,7 +19,7 @@
     public sealed class BaseChart : Control
     {
         private readonly SeriesFactory seriesFactory = new SeriesFactory();
-        private readonly IDictionary<ChartData, Series> series = new Dictionary<ChartData, Series>(new ReferenceEqualityComparer());
+        private readonly IDictionary<ChartData, Series> series = new Dictionary<ChartData, Series>(new ReferenceEqualityComparer<ChartData>());
         private PlotView view;
 
         /// <summary>
@@ -54,16 +54,13 @@
         /// <param name="visibility">A boolean value representing the new visibility of the <paramref name="serie"/>.</param>
         public void SetVisibility(ChartData serie, bool visibility)
         {
-            if (serie != null)
+            if (serie == null)
             {
-                serie.IsVisible = visibility;
-                series[serie].IsVisible = visibility;
-                view.Invalidate();
+                throw new ArgumentNullException("serie", "Cannot set visibility of a null serie.");
             }
-            else
-            {
-                throw new ArgumentException("Visibility set for IChartData which was not of type Series.");
-            }
+            serie.IsVisible = visibility;
+            series[serie].IsVisible = visibility;
+            view.Invalidate();
         }
 
         /// <summary>
@@ -152,20 +149,4 @@
             }
         }
     }
-
-    /// <summary>
-    /// This class determines whether two objects are equal based on their references.
-    /// </summary>
-    internal class ReferenceEqualityComparer : IEqualityComparer<ChartData>
-    {
-        public bool Equals(ChartData x, ChartData y)
-        {
-            return ReferenceEquals(x, y);
-        }
-
-        public int GetHashCode(ChartData obj)
-        {
-            return RuntimeHelpers.GetHashCode(obj);
-        }
-    }
 }
\ No newline at end of file
Index: Core/Components/src/Core.Components.OxyPlot.Forms/Core.Components.OxyPlot.Forms.csproj
===================================================================
diff -u -rba3f5abc18676f64d95d75270494424f169b3c4e -rc0c01906c23d8951360f8c299473e1eb92729451
--- Core/Components/src/Core.Components.OxyPlot.Forms/Core.Components.OxyPlot.Forms.csproj	(.../Core.Components.OxyPlot.Forms.csproj)	(revision ba3f5abc18676f64d95d75270494424f169b3c4e)
+++ Core/Components/src/Core.Components.OxyPlot.Forms/Core.Components.OxyPlot.Forms.csproj	(.../Core.Components.OxyPlot.Forms.csproj)	(revision c0c01906c23d8951360f8c299473e1eb92729451)
@@ -62,6 +62,10 @@
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\..\..\Common\src\Core.Common.Utils\Core.Common.Utils.csproj">
+      <Project>{F49BD8B2-332A-4C91-A196-8CCE0A2C7D98}</Project>
+      <Name>Core.Common.Utils</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\..\Common\src\Core.Common.Version\Core.Common.Version.csproj">
       <Project>{c90b77da-e421-43cc-b82e-529651bc21ac}</Project>
       <Name>Core.Common.Version</Name>
Index: Core/Components/test/Core.Components.OxyPlot.Forms.Test/BaseChartTest.cs
===================================================================
diff -u -rdaaa148db691a71c042fcdd3ca039cf13c59217c -rc0c01906c23d8951360f8c299473e1eb92729451
--- Core/Components/test/Core.Components.OxyPlot.Forms.Test/BaseChartTest.cs	(.../BaseChartTest.cs)	(revision daaa148db691a71c042fcdd3ca039cf13c59217c)
+++ Core/Components/test/Core.Components.OxyPlot.Forms.Test/BaseChartTest.cs	(.../BaseChartTest.cs)	(revision c0c01906c23d8951360f8c299473e1eb92729451)
@@ -103,5 +103,18 @@
             // Assert
             Assert.Throws<KeyNotFoundException>(test);
         }
+
+        [Test]
+        public void SetVisibility_ForNull_ThrowsArgumentNullException()
+        {
+            // Setup
+            var chart = new BaseChart();
+
+            // Call
+            TestDelegate test = () => chart.SetVisibility(null, true);
+            
+            // Assert
+            Assert.Throws<ArgumentNullException>(test);
+        }
     }
 }
\ No newline at end of file
Index: packages/repositories.config
===================================================================
diff -u -rba3f5abc18676f64d95d75270494424f169b3c4e -rc0c01906c23d8951360f8c299473e1eb92729451
--- packages/repositories.config	(.../repositories.config)	(revision ba3f5abc18676f64d95d75270494424f169b3c4e)
+++ packages/repositories.config	(.../repositories.config)	(revision c0c01906c23d8951360f8c299473e1eb92729451)
@@ -25,6 +25,7 @@
   <repository path="..\Core\Components\src\Core.Components.DotSpatial\packages.config" />
   <repository path="..\Core\Components\src\Core.Components.OxyPlot.Forms\packages.config" />
   <repository path="..\Core\Components\src\Core.Components.OxyPlot\packages.config" />
+  <repository path="..\Core\Components\test\Core.Components.Charting.Test\packages.config" />
   <repository path="..\Core\Components\test\Core.Components.DotSpatial.Test\packages.config" />
   <repository path="..\Core\Components\test\Core.Components.OxyPlot.Forms.Test\packages.config" />
   <repository path="..\Core\Components\test\Core.Components.OxyPlot.Test\packages.config" />