diff --git a/SunnyUI/Controls/UINavMenu.cs b/SunnyUI/Controls/UINavMenu.cs
index c0e2f78f..b26ca74a 100644
--- a/SunnyUI/Controls/UINavMenu.cs
+++ b/SunnyUI/Controls/UINavMenu.cs
@@ -43,8 +43,8 @@ namespace Sunny.UI
             BorderStyle = BorderStyle.None;
             //HideSelection = false;
             DrawMode = TreeViewDrawMode.OwnerDrawAll;
-            //FullRowSelect = true;
-            //ShowLines = false;
+            FullRowSelect = true;
+            ShowLines = false;
             //ShowPlusMinus = false;
             //ShowRootLines = false;
 
@@ -353,7 +353,7 @@ namespace Sunny.UI
 
         public void SetNodeTipsText(TreeNode node, string tipsText)
         {
-            MenuHelper.SetTipsText(node,tipsText);
+            MenuHelper.SetTipsText(node, tipsText);
         }
 
         public void SetNodeSymbol(TreeNode node, int symbol, int symbolSize = 24)
@@ -610,14 +610,20 @@ namespace Sunny.UI
                 TreeNode node = e.Node.PrevNode;
                 while (node != null)
                 {
-                    node.Collapse();
+                    if (node.IsExpanded)
+                    {
+                        node.Collapse();
+                    }
                     node = node.PrevNode;
                 }
 
                 node = e.Node.NextNode;
                 while (node != null)
                 {
-                    node.Collapse();
+                    if (node.IsExpanded)
+                    {
+                        node.Collapse();
+                    }
                     node = node.NextNode;
                 }
             }