Index: src/Plugins/Wti/Wti.Data/Wti.Data.csproj
===================================================================
diff -u -ra4ac4e49268888b50f6f9606a1b8dd8225e1b24f -rfdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade
--- src/Plugins/Wti/Wti.Data/Wti.Data.csproj	(.../Wti.Data.csproj)	(revision a4ac4e49268888b50f6f9606a1b8dd8225e1b24f)
+++ src/Plugins/Wti/Wti.Data/Wti.Data.csproj	(.../Wti.Data.csproj)	(revision fdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade)
@@ -56,6 +56,10 @@
     <Compile Include="WtiProject.cs" />
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\..\..\Common\DelftTools.Shell.Core\DelftTools.Shell.Core.csproj">
+      <Project>{82b61d20-fd4b-49be-9252-5bf6e3ee4666}</Project>
+      <Name>DelftTools.Shell.Core</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\..\Common\DelftTools.Utils\DelftTools.Utils.csproj">
       <Project>{f49bd8b2-332a-4c91-a196-8cce0a2c7d98}</Project>
       <Name>DelftTools.Utils</Name>
Index: src/Plugins/Wti/Wti.Data/WtiProject.cs
===================================================================
diff -u -ra4ac4e49268888b50f6f9606a1b8dd8225e1b24f -rfdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade
--- src/Plugins/Wti/Wti.Data/WtiProject.cs	(.../WtiProject.cs)	(revision a4ac4e49268888b50f6f9606a1b8dd8225e1b24f)
+++ src/Plugins/Wti/Wti.Data/WtiProject.cs	(.../WtiProject.cs)	(revision fdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade)
@@ -1,14 +1,43 @@
-using DelftTools.Utils;
+using System;
+using System.Collections.Generic;
 
+using DelftTools.Shell.Core;
+using DelftTools.Utils;
+
 namespace Wti.Data
 {
-    public class WtiProject : INameable
+    public class WtiProject : INameable, IObservable
     {
+        private IList<IObserver> observers = new List<IObserver>();
+
         public WtiProject()
         {
             Name = "WTI 2017 project";
         }
 
         public string Name { get; set; }
+
+        #region IObservable
+
+        public void Attach(IObserver observer)
+        {
+            observers.Add(observer);
+        }
+
+        public void Detach(IObserver observer)
+        {
+            observers.Remove(observer);
+        }
+
+        public void NotifyObservers()
+        {
+            foreach (var observer in observers)
+            {
+                observer.UpdateObserver();
+            }
+        }
+
+        #endregion
+
     }
 }
\ No newline at end of file
Index: src/Plugins/Wti/Wti.Forms/NodePresenters/WtiProjectNodePresenter.cs
===================================================================
diff -u -rde830d165e579ad499b766e36eb280aac8820653 -rfdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade
--- src/Plugins/Wti/Wti.Forms/NodePresenters/WtiProjectNodePresenter.cs	(.../WtiProjectNodePresenter.cs)	(revision de830d165e579ad499b766e36eb280aac8820653)
+++ src/Plugins/Wti/Wti.Forms/NodePresenters/WtiProjectNodePresenter.cs	(.../WtiProjectNodePresenter.cs)	(revision fdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade)
@@ -48,7 +48,9 @@
         public void OnNodeRenamed(object nodeData, string newName)
         {
             var project = (WtiProject)nodeData;
+
             project.Name = newName;
+            project.NotifyObservers();
         }
 
         public void OnNodeChecked(ITreeNode node)
Index: src/Plugins/Wti/Wti.Forms/PropertyClasses/WtiProjectProperties.cs
===================================================================
diff -u -ra4ac4e49268888b50f6f9606a1b8dd8225e1b24f -rfdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade
--- src/Plugins/Wti/Wti.Forms/PropertyClasses/WtiProjectProperties.cs	(.../WtiProjectProperties.cs)	(revision a4ac4e49268888b50f6f9606a1b8dd8225e1b24f)
+++ src/Plugins/Wti/Wti.Forms/PropertyClasses/WtiProjectProperties.cs	(.../WtiProjectProperties.cs)	(revision fdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade)
@@ -15,6 +15,7 @@
             set
             {
                 data.Name = value;
+                data.NotifyObservers();
             }
         }
     }
Index: test/Plugins/Wti/Wti.Data.Test/Wti.Data.Test.csproj
===================================================================
diff -u -ra4ac4e49268888b50f6f9606a1b8dd8225e1b24f -rfdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade
--- test/Plugins/Wti/Wti.Data.Test/Wti.Data.Test.csproj	(.../Wti.Data.Test.csproj)	(revision a4ac4e49268888b50f6f9606a1b8dd8225e1b24f)
+++ test/Plugins/Wti/Wti.Data.Test/Wti.Data.Test.csproj	(.../Wti.Data.Test.csproj)	(revision fdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade)
@@ -51,6 +51,9 @@
     <Reference Include="nunit.framework">
       <HintPath>..\..\..\..\lib\nunit.framework.dll</HintPath>
     </Reference>
+    <Reference Include="Rhino.Mocks">
+      <HintPath>..\..\..\..\lib\Rhino.Mocks.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Xml.Linq" />
@@ -64,6 +67,10 @@
     <Compile Include="WtiProjectTest.cs" />
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\..\..\..\src\Common\DelftTools.Shell.Core\DelftTools.Shell.Core.csproj">
+      <Project>{82b61d20-fd4b-49be-9252-5bf6e3ee4666}</Project>
+      <Name>DelftTools.Shell.Core</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\..\..\src\Common\DelftTools.Utils\DelftTools.Utils.csproj">
       <Project>{f49bd8b2-332a-4c91-a196-8cce0a2c7d98}</Project>
       <Name>DelftTools.Utils</Name>
Index: test/Plugins/Wti/Wti.Data.Test/WtiProjectTest.cs
===================================================================
diff -u -ra4ac4e49268888b50f6f9606a1b8dd8225e1b24f -rfdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade
--- test/Plugins/Wti/Wti.Data.Test/WtiProjectTest.cs	(.../WtiProjectTest.cs)	(revision a4ac4e49268888b50f6f9606a1b8dd8225e1b24f)
+++ test/Plugins/Wti/Wti.Data.Test/WtiProjectTest.cs	(.../WtiProjectTest.cs)	(revision fdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade)
@@ -1,7 +1,12 @@
-using DelftTools.Utils;
+using System;
 
+using DelftTools.Shell.Core;
+using DelftTools.Utils;
+
 using NUnit.Framework;
 
+using Rhino.Mocks;
+
 namespace Wti.Data.Test
 {
     [TestFixture]
@@ -15,7 +20,48 @@
 
             // assert
             Assert.IsInstanceOf<INameable>(project);
+            Assert.IsInstanceOf<IObservable>(project);
             Assert.AreEqual("WTI 2017 project", project.Name);
         }
+
+        [Test]
+        public void NotifyObservers_ObserverAttachedToProject_ObserverIsNotified()
+        {
+            // setup
+            var mocks = new MockRepository();
+            var observer = mocks.StrictMock<IObserver>();
+            observer.Expect(o => o.UpdateObserver());
+            mocks.ReplayAll();
+
+            var project = new WtiProject();
+            project.Attach(observer);
+
+            // call
+            project.NotifyObservers();
+
+            // assert
+            mocks.VerifyAll();
+        }
+
+        [Test]
+        public void NotifyObservers_ObserverHasBeenDetached_ObserverShouldNotBeNotified()
+        {
+            // setup
+            var mocks = new MockRepository();
+            var observer = mocks.StrictMock<IObserver>();
+            mocks.ReplayAll();
+
+            var project = new WtiProject();
+            project.Attach(observer);
+            project.Detach(observer);
+
+            // call
+            project.NotifyObservers();
+
+            // assert
+            mocks.VerifyAll(); // Expect no calls on observer
+        }
+        
+        
     }
 }
\ No newline at end of file
Index: test/Plugins/Wti/Wti.Forms.Test/NodePresenters/WtiProjectNodePresenterTest.cs
===================================================================
diff -u -rde830d165e579ad499b766e36eb280aac8820653 -rfdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade
--- test/Plugins/Wti/Wti.Forms.Test/NodePresenters/WtiProjectNodePresenterTest.cs	(.../WtiProjectNodePresenterTest.cs)	(revision de830d165e579ad499b766e36eb280aac8820653)
+++ test/Plugins/Wti/Wti.Forms.Test/NodePresenters/WtiProjectNodePresenterTest.cs	(.../WtiProjectNodePresenterTest.cs)	(revision fdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade)
@@ -110,19 +110,26 @@
         }
 
         [Test]
-        public void OnNodeRenamed_WithData_SetProjectName()
+        public void OnNodeRenamed_WithData_SetProjectNameWithNotification()
         {
             // setup
+            var mocks = new MockRepository();
+            var projectObserver = mocks.StrictMock<IObserver>();
+            projectObserver.Expect(o => o.UpdateObserver());
+            mocks.ReplayAll();
+
             var nodePresenter = new WtiProjectNodePresenter();
 
             var project = new WtiProject();
+            project.Attach(projectObserver);
 
             // call
             const string newName = "New Name";
             nodePresenter.OnNodeRenamed(project, newName);
 
             // assert
             Assert.AreEqual(newName, project.Name);
+            mocks.VerifyAll();
         }
 
         [Test]
Index: test/Plugins/Wti/Wti.Forms.Test/PropertyClasses/WtiProjectPropertiesTest.cs
===================================================================
diff -u -ra4ac4e49268888b50f6f9606a1b8dd8225e1b24f -rfdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade
--- test/Plugins/Wti/Wti.Forms.Test/PropertyClasses/WtiProjectPropertiesTest.cs	(.../WtiProjectPropertiesTest.cs)	(revision a4ac4e49268888b50f6f9606a1b8dd8225e1b24f)
+++ test/Plugins/Wti/Wti.Forms.Test/PropertyClasses/WtiProjectPropertiesTest.cs	(.../WtiProjectPropertiesTest.cs)	(revision fdc45df8cf7ca4dba62fb6e96b5cf8ef7ab73ade)
@@ -1,7 +1,10 @@
-using DelftTools.Shell.Gui;
+using DelftTools.Shell.Core;
+using DelftTools.Shell.Gui;
 
 using NUnit.Framework;
 
+using Rhino.Mocks;
+
 using Wti.Data;
 using Wti.Forms.PropertyClasses;
 
@@ -37,17 +40,24 @@
         }
 
         [Test]
-        public void SetProperties_WithData_UpdateData()
+        public void SetProperties_WithData_UpdateDataAndNotifyObservers()
         {
             // setup
+            var mocks = new MockRepository();
+            var projectObserver = mocks.StrictMock<IObserver>();
+            projectObserver.Expect(o => o.UpdateObserver());
+            mocks.ReplayAll();
+
             var project = new WtiProject();
+            project.Attach(projectObserver);
 
             var properties = new WtiProjectProperties { Data = project };
 
             // call & Assert
             const string newName = "Test";
             properties.Name = newName;
             Assert.AreEqual(newName, project.Name);
+            mocks.VerifyAll();
         }