diff --git a/Bin/net40/SunnyUI.Demo.exe b/Bin/net40/SunnyUI.Demo.exe
index 68a80ae9..bf02be3d 100644
Binary files a/Bin/net40/SunnyUI.Demo.exe and b/Bin/net40/SunnyUI.Demo.exe differ
diff --git a/Bin/net40/SunnyUI.dll b/Bin/net40/SunnyUI.dll
index 0d589df5..8a791ce1 100644
Binary files a/Bin/net40/SunnyUI.dll and b/Bin/net40/SunnyUI.dll differ
diff --git a/Bin/net5.0-windows/SunnyUI.dll b/Bin/net5.0-windows/SunnyUI.dll
index c83acab5..966151e4 100644
Binary files a/Bin/net5.0-windows/SunnyUI.dll and b/Bin/net5.0-windows/SunnyUI.dll differ
diff --git a/Bin/net5.0-windows/ref/SunnyUI.dll b/Bin/net5.0-windows/ref/SunnyUI.dll
index c65580e0..53825b89 100644
Binary files a/Bin/net5.0-windows/ref/SunnyUI.dll and b/Bin/net5.0-windows/ref/SunnyUI.dll differ
diff --git a/Bin/netcoreapp3.1/SunnyUI.dll b/Bin/netcoreapp3.1/SunnyUI.dll
index 77b481fe..61c4cf0a 100644
Binary files a/Bin/netcoreapp3.1/SunnyUI.dll and b/Bin/netcoreapp3.1/SunnyUI.dll differ
diff --git a/SunnyUI.Demo/Controls/FContextMenuStrip.Designer.cs b/SunnyUI.Demo/Controls/FContextMenuStrip.Designer.cs
index 4d08dee7..ac317282 100644
--- a/SunnyUI.Demo/Controls/FContextMenuStrip.Designer.cs
+++ b/SunnyUI.Demo/Controls/FContextMenuStrip.Designer.cs
@@ -47,6 +47,7 @@
             this.uiButton1.Cursor = System.Windows.Forms.Cursors.Hand;
             this.uiButton1.Font = new System.Drawing.Font("微软雅黑", 12F);
             this.uiButton1.Location = new System.Drawing.Point(30, 57);
+            this.uiButton1.MinimumSize = new System.Drawing.Size(1, 1);
             this.uiButton1.Name = "uiButton1";
             this.uiButton1.Size = new System.Drawing.Size(232, 35);
             this.uiButton1.TabIndex = 0;
@@ -56,13 +57,14 @@
             // 
             this.uiContextMenuStrip1.Font = new System.Drawing.Font("微软雅黑", 12F);
             this.uiContextMenuStrip1.Name = "uiContextMenuStrip1";
-            this.uiContextMenuStrip1.Size = new System.Drawing.Size(61, 4);
+            this.uiContextMenuStrip1.Size = new System.Drawing.Size(181, 26);
             // 
             // uiButton2
             // 
             this.uiButton2.Cursor = System.Windows.Forms.Cursors.Hand;
             this.uiButton2.Font = new System.Drawing.Font("微软雅黑", 12F);
             this.uiButton2.Location = new System.Drawing.Point(294, 57);
+            this.uiButton2.MinimumSize = new System.Drawing.Size(1, 1);
             this.uiButton2.Name = "uiButton2";
             this.uiButton2.Size = new System.Drawing.Size(232, 35);
             this.uiButton2.TabIndex = 1;
diff --git a/SunnyUI/Controls/UINavBar.cs b/SunnyUI/Controls/UINavBar.cs
index c74d473e..c87673ed 100644
--- a/SunnyUI/Controls/UINavBar.cs
+++ b/SunnyUI/Controls/UINavBar.cs
@@ -255,6 +255,7 @@ namespace Sunny.UI
         }
 
         [DefaultValue(null)]
+        [Browsable(false)]
         [Description("下拉菜单图片列表"), Category("SunnyUI")]
         public ImageList DropMenuImageList
         {
@@ -505,10 +506,12 @@ namespace Sunny.UI
 
             NavBarMenu.Style = UIStyles.Style;
             NavBarMenu.Items.Clear();
+            NavBarMenu.ImageList = ImageList;
             foreach (TreeNode node in Nodes[SelectedIndex].Nodes)
             {
                 ToolStripMenuItem item = new ToolStripMenuItem(node.Text) { Tag = node };
                 item.Click += Item_Click;
+                if (ImageList != null) item.ImageIndex = node.ImageIndex;
                 NavBarMenu.Items.Add(item);
 
                 if (node.Nodes.Count > 0)
@@ -528,13 +531,25 @@ namespace Sunny.UI
             {
                 item.AutoSize = false;
                 item.Width = NavBarMenu.Width - 1;
-                item.Height = 30;
+
+                if (!DropDownItemAutoHeight)
+                {
+                    item.Height = DropDownItemHeight;
+                }
             }
 
             NavBarMenu.CalcHeight();
             NavBarMenu.Show(this, NodeMenuLeft(SelectedIndex), Height);
         }
 
+        [DefaultValue(30)]
+        [Description("下拉菜单节点高度"), Category("SunnyUI")]
+        public int DropDownItemHeight { get; set; } = 30;
+
+        [DefaultValue(false)]
+        [Description("下拉菜单节点自动高度"), Category("SunnyUI")]
+        public bool DropDownItemAutoHeight { get; set; } = false;
+
         private void Item_Click(object sender, EventArgs e)
         {
             ToolStripMenuItem item = (ToolStripMenuItem)sender;
@@ -559,6 +574,7 @@ namespace Sunny.UI
             foreach (TreeNode childNode in node.Nodes)
             {
                 ToolStripMenuItem childItem = new ToolStripMenuItem(childNode.Text) { Tag = childNode };
+                if (ImageList != null) childItem.ImageIndex = childNode.ImageIndex;
                 childItem.Click += Item_Click;
                 item.DropDownItems.Add(childItem);