Add description for attached properties

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/wpfdesigner@6007 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.AddIn/Src/PropertyDescriptionService.cs

@@ -27,6 +27,15 @@ namespace ICSharpCode.WpfDesign.AddIn
         {
             IProjectContent pc = MyTypeFinder.GetProjectContent(file);
             if (pc != null) {
+            	 // For attached Properties
+                if (property.DependencyFullName != null && property.Name.Contains(".")) {
+                    IClass c = pc.GetClassByReflectionName(property.DependencyProperty.OwnerType.FullName, true);
+                    if (c != null) {
+                        IMember m = DefaultProjectContent.GetMemberByReflectionName(c, property.DependencyProperty.Name + "Property");
+                        if (m != null)
+                            return CodeCompletionItem.ConvertDocumentation(m.Documentation);
+                    }
+                } else {
                     IClass c = pc.GetClassByReflectionName(property.DeclaringType.FullName, true);
                     if (c != null) {
                         IMember m = DefaultProjectContent.GetMemberByReflectionName(c, property.Name);
@@ -34,6 +43,7 @@ namespace ICSharpCode.WpfDesign.AddIn
                             return CodeCompletionItem.ConvertDocumentation(m.Documentation);
                     }
                 }
+            }
             return null;
         }
     }