diff --git a/src/Main/Base/Project/Src/Gui/Dialogs/NewFileDialog.cs b/src/Main/Base/Project/Src/Gui/Dialogs/NewFileDialog.cs
index 74f925d0bd..30f3603a7f 100644
--- a/src/Main/Base/Project/Src/Gui/Dialogs/NewFileDialog.cs
+++ b/src/Main/Base/Project/Src/Gui/Dialogs/NewFileDialog.cs
@@ -196,6 +196,7 @@ namespace ICSharpCode.SharpDevelop.Gui
 		void CategoryChange(object sender, TreeViewEventArgs e)
 		{
 			((ListView)ControlDictionary["templateListView"]).Items.Clear();
+			HidePropertyGrid();
 			if (((TreeView)ControlDictionary["categoryTreeView"]).SelectedNode != null) {
 				foreach (TemplateItem item in ((Category)((TreeView)ControlDictionary["categoryTreeView"]).SelectedNode).Templates) {
 					((ListView)ControlDictionary["templateListView"]).Items.Add(item);