diff --git a/src/AddIns/BackendBindings/VBNetBinding/Project/Src/OptionPanels/ProjectImports.cs b/src/AddIns/BackendBindings/VBNetBinding/Project/Src/OptionPanels/ProjectImports.cs
index c28911ac19..85f8e775b5 100644
--- a/src/AddIns/BackendBindings/VBNetBinding/Project/Src/OptionPanels/ProjectImports.cs
+++ b/src/AddIns/BackendBindings/VBNetBinding/Project/Src/OptionPanels/ProjectImports.cs
@@ -39,11 +39,30 @@ namespace VBNetBinding.OptionPanels
 					Get<ListBox>("imports").Items.Add(item.Include);
 				}
 			}
+		
+			DefaultProjectContent projectContent = (DefaultProjectContent)ParserService.GetProjectContent(project);
+			foreach(DefaultProjectContent refProjectContent in projectContent.ReferencedContents)
+			{
+				addNamespaces(refProjectContent);
+				
+			}
+			addNamespaces(projectContent);
 			
 			namespacesComboBox_TextCanged(null, EventArgs.Empty);
 			importsListBox_SelectedIndexChanged(null, EventArgs.Empty);
 		}
 		
+		private void addNamespaces(DefaultProjectContent projectContent)
+		{
+			Dictionary<string, DefaultProjectContent.NamespaceStruct>.KeyCollection namespaces = projectContent.NamespaceNames;
+			foreach(string projectNamespace in namespaces)
+			{
+				if(projectNamespace != "") {
+					Get<ComboBox>("namespaces").Items.Add(projectNamespace);
+				}
+			}
+		}
+		
 		private void namespacesComboBox_TextCanged(object sender, EventArgs e)
 		{
 			Get<Button>("addImport").Enabled = Get<ComboBox>("namespaces").Text != "" &&
diff --git a/src/Main/Base/Project/Src/Services/ParserService/DefaultProjectContent.cs b/src/Main/Base/Project/Src/Services/ParserService/DefaultProjectContent.cs
index 540429186b..d9ee38ddbb 100644
--- a/src/Main/Base/Project/Src/Services/ParserService/DefaultProjectContent.cs
+++ b/src/Main/Base/Project/Src/Services/ParserService/DefaultProjectContent.cs
@@ -62,6 +62,13 @@ namespace ICSharpCode.Core
 			}
 		}
 		
+		public Dictionary<string, NamespaceStruct>.KeyCollection NamespaceNames
+		{
+			get {
+				return Namespaces[0].Keys;
+			}
+		}
+		
 		protected List<Dictionary<string, NamespaceStruct>> Namespaces {
 			get {
 				if (namespaces.Count == 0) {
@@ -71,7 +78,7 @@ namespace ICSharpCode.Core
 			}
 		}
 		
-		protected struct NamespaceStruct
+		public struct NamespaceStruct
 		{
 			public readonly List<IClass> Classes;
 			public readonly List<string> SubNamespaces;