Index: Core/GIS/src/Core.GIS.SharpMap/Rendering/Thematics/CategorialThemeItem.cs
===================================================================
diff -u -r1df4e869896a36a0b847ef497b6a48c270b25ce0 -rb6ffe77a74979f9893a1b338a13acce47c57feda
--- Core/GIS/src/Core.GIS.SharpMap/Rendering/Thematics/CategorialThemeItem.cs	(.../CategorialThemeItem.cs)	(revision 1df4e869896a36a0b847ef497b6a48c270b25ce0)
+++ Core/GIS/src/Core.GIS.SharpMap/Rendering/Thematics/CategorialThemeItem.cs	(.../CategorialThemeItem.cs)	(revision b6ffe77a74979f9893a1b338a13acce47c57feda)
@@ -15,23 +15,22 @@
 
         public CategorialThemeItem(string category, IStyle style, object value)
         {
-            label = category;
-            this.style = (IStyle) style.Clone();
+            Label = category;
+            Style = (IStyle) style.Clone();
 
             Value = value;
         }
 
         public CategorialThemeItem(string category, IStyle style)
         {
-            label = category;
-            this.style = (IStyle) style.Clone();
+            Label = category;
+            Style = (IStyle) style.Clone();
         }
 
         private CategorialThemeItem(CategorialThemeItem another)
         {
-            label = another.Label;
-            style = (IStyle) another.Style.Clone();
-
+            Label = another.Label;
+            Style = (IStyle) another.Style.Clone();
             Value = another.Value;
         }
 
@@ -64,7 +63,7 @@
 
         public override int CompareTo(object obj)
         {
-            return label.CompareTo(((CategorialThemeItem) obj).label);
+            return Label.CompareTo(((CategorialThemeItem) obj).Label);
         }
     }
 }
\ No newline at end of file
Index: Core/GIS/src/Core.GIS.SharpMap/Rendering/Thematics/GradientThemeItem.cs
===================================================================
diff -u -ra950714ad9510756331d862aa35695fa0b2ed03b -rb6ffe77a74979f9893a1b338a13acce47c57feda
--- Core/GIS/src/Core.GIS.SharpMap/Rendering/Thematics/GradientThemeItem.cs	(.../GradientThemeItem.cs)	(revision a950714ad9510756331d862aa35695fa0b2ed03b)
+++ Core/GIS/src/Core.GIS.SharpMap/Rendering/Thematics/GradientThemeItem.cs	(.../GradientThemeItem.cs)	(revision b6ffe77a74979f9893a1b338a13acce47c57feda)
@@ -11,15 +11,15 @@
 
         public GradientThemeItem(IStyle style, string label, string range)
         {
-            this.label = label;
-            this.style = (IStyle) style.Clone();
+            Label = label;
+            Style = (IStyle) style.Clone();
             this.range = range;
         }
 
         public GradientThemeItem(GradientThemeItem another)
         {
-            label = another.Label;
-            style = (IStyle) another.Style.Clone();
+            Label = another.Label;
+            Style = (IStyle) another.Style.Clone();
             range = another.Range.Clone() as string;
         }
 
@@ -38,7 +38,7 @@
 
         public override int CompareTo(object obj)
         {
-            return label.CompareTo(((GradientThemeItem) obj).label);
+            return Label.CompareTo(((GradientThemeItem) obj).Label);
         }
     }
 }
\ No newline at end of file
Index: Core/GIS/src/Core.GIS.SharpMap/Rendering/Thematics/ThemeItem.cs
===================================================================
diff -u -r29074485032e73e932140ea9980c21d929e4dc08 -rb6ffe77a74979f9893a1b338a13acce47c57feda
--- Core/GIS/src/Core.GIS.SharpMap/Rendering/Thematics/ThemeItem.cs	(.../ThemeItem.cs)	(revision 29074485032e73e932140ea9980c21d929e4dc08)
+++ Core/GIS/src/Core.GIS.SharpMap/Rendering/Thematics/ThemeItem.cs	(.../ThemeItem.cs)	(revision b6ffe77a74979f9893a1b338a13acce47c57feda)
@@ -1,7 +1,6 @@
 using System;
 using System.ComponentModel;
 using System.Drawing;
-using Core.Common.Utils;
 using Core.GIS.GeoAPI.Geometries;
 using Core.GIS.SharpMap.Api;
 using Core.GIS.SharpMap.Styles;
@@ -10,8 +9,8 @@
 {
     public abstract class ThemeItem : IThemeItem, ICloneable
     {
-        protected string label;
-        protected IStyle style;
+        private string label;
+        private IStyle style;
 
         /// <summary>
         /// The label identifying this ThemeItem (for example shown in a legend).
@@ -39,7 +38,21 @@
             set
             {
                 OnPropertyChanging("Style");
+
+                if (style != null)
+                {
+                    style.PropertyChanging -= OnPropertyChanging;
+                    style.PropertyChanged -= OnPropertyChanged;
+                }
+
                 style = value;
+
+                if (style != null)
+                {
+                    style.PropertyChanging += OnPropertyChanging;
+                    style.PropertyChanged += OnPropertyChanged;
+                }
+
                 OnPropertyChanged("Style");
             }
         }
@@ -85,6 +98,14 @@
             }
         }
 
+        private void OnPropertyChanging(object sender, PropertyChangingEventArgs e)
+        {
+            if (PropertyChanging != null)
+            {
+                PropertyChanging(sender, e);
+            }
+        }
+
         public event PropertyChangedEventHandler PropertyChanged;
 
         protected void OnPropertyChanged(string propertyName)
@@ -95,6 +116,14 @@
             }
         }
 
+        private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
+        {
+            if (PropertyChanged != null)
+            {
+                PropertyChanged(sender, e);
+            }
+        }
+
         #endregion
     }
 }
\ No newline at end of file
Index: Core/GIS/test/Core.GIS.SharpMap.Tests/Core.GIS.SharpMap.Tests.csproj
===================================================================
diff -u -rb8ba6aba1df53a77e72e1fe9cfa73c62aadadeb6 -rb6ffe77a74979f9893a1b338a13acce47c57feda
--- Core/GIS/test/Core.GIS.SharpMap.Tests/Core.GIS.SharpMap.Tests.csproj	(.../Core.GIS.SharpMap.Tests.csproj)	(revision b8ba6aba1df53a77e72e1fe9cfa73c62aadadeb6)
+++ Core/GIS/test/Core.GIS.SharpMap.Tests/Core.GIS.SharpMap.Tests.csproj	(.../Core.GIS.SharpMap.Tests.csproj)	(revision b6ffe77a74979f9893a1b338a13acce47c57feda)
@@ -134,8 +134,10 @@
       <DependentUpon>Resources.resx</DependentUpon>
     </Compile>
     <Compile Include="Rendering\MapHelperTest.cs" />
+    <Compile Include="Rendering\Thematics\CategorialThemeItemTest.cs" />
     <Compile Include="Rendering\Thematics\CategorialThemeTest.cs" />
     <Compile Include="Rendering\Thematics\ColorBlendTest.cs" />
+    <Compile Include="Rendering\Thematics\GradientThemeItemTest.cs" />
     <Compile Include="Rendering\Thematics\GradientThemeTest.cs" />
     <Compile Include="Rendering\VectorRenderingHelperTest.cs" />
   </ItemGroup>
Index: Core/GIS/test/Core.GIS.SharpMap.Tests/Rendering/Thematics/CategorialThemeItemTest.cs
===================================================================
diff -u
--- Core/GIS/test/Core.GIS.SharpMap.Tests/Rendering/Thematics/CategorialThemeItemTest.cs	(revision 0)
+++ Core/GIS/test/Core.GIS.SharpMap.Tests/Rendering/Thematics/CategorialThemeItemTest.cs	(revision b6ffe77a74979f9893a1b338a13acce47c57feda)
@@ -0,0 +1,31 @@
+using System.ComponentModel;
+using Core.GIS.SharpMap.Api;
+using Core.GIS.SharpMap.Rendering.Thematics;
+using Core.GIS.SharpMap.Styles;
+using NUnit.Framework;
+
+namespace Core.GIS.SharpMap.Tests.Rendering.Thematics
+{
+    [TestFixture]
+    public class CategorialThemeItemTest
+    {
+        [Test]
+        public void CategorialThemeItemBubblesPropertyChangesOfStyle()
+        {
+            var counter = 0;
+            var categorialThemeItem = new CategorialThemeItem("", new VectorStyle());
+
+            ((INotifyPropertyChanged) categorialThemeItem).PropertyChanged += (sender, e) =>
+            {
+                if (sender is IStyle)
+                {
+                    counter++;
+                }
+            };
+
+            ((VectorStyle) categorialThemeItem.Style).EnableOutline = true;
+
+            Assert.AreEqual(1, counter);
+        }
+    }
+}
Index: Core/GIS/test/Core.GIS.SharpMap.Tests/Rendering/Thematics/GradientThemeItemTest.cs
===================================================================
diff -u
--- Core/GIS/test/Core.GIS.SharpMap.Tests/Rendering/Thematics/GradientThemeItemTest.cs	(revision 0)
+++ Core/GIS/test/Core.GIS.SharpMap.Tests/Rendering/Thematics/GradientThemeItemTest.cs	(revision b6ffe77a74979f9893a1b338a13acce47c57feda)
@@ -0,0 +1,31 @@
+using System.ComponentModel;
+using Core.GIS.SharpMap.Api;
+using Core.GIS.SharpMap.Rendering.Thematics;
+using Core.GIS.SharpMap.Styles;
+using NUnit.Framework;
+
+namespace Core.GIS.SharpMap.Tests.Rendering.Thematics
+{
+    [TestFixture]
+    public class GradientThemeItemTest
+    {
+        [Test]
+        public void GradientThemeItemBubblesPropertyChangesOfStyle()
+        {
+            var counter = 0;
+            var gradientThemeItem = new GradientThemeItem(new VectorStyle(), "", "");
+
+            ((INotifyPropertyChanged)gradientThemeItem).PropertyChanged += (sender, e) =>
+            {
+                if (sender is IStyle)
+                {
+                    counter++;
+                }
+            };
+
+            ((VectorStyle) gradientThemeItem.Style).EnableOutline = true;
+
+            Assert.AreEqual(1, counter);
+        }
+    }
+}