diff --git a/Bin/net40/SunnyUI.dll b/Bin/net40/SunnyUI.dll
index bbb495f7..360e8ce8 100644
Binary files a/Bin/net40/SunnyUI.dll and b/Bin/net40/SunnyUI.dll differ
diff --git a/Bin/net45/SunnyUI.dll b/Bin/net45/SunnyUI.dll
index 5807e010..069c289c 100644
Binary files a/Bin/net45/SunnyUI.dll and b/Bin/net45/SunnyUI.dll differ
diff --git a/Bin/net5.0-windows/SunnyUI.dll b/Bin/net5.0-windows/SunnyUI.dll
index 35ffbcbd..3a8002b7 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 90acfd05..e11f0006 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 b38299b2..625097c2 100644
Binary files a/Bin/netcoreapp3.1/SunnyUI.dll and b/Bin/netcoreapp3.1/SunnyUI.dll differ
diff --git a/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Common.dll b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Common.dll
new file mode 100644
index 00000000..6741d9f0
Binary files /dev/null and b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Common.dll differ
diff --git a/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.deps.json b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.deps.json
new file mode 100644
index 00000000..beb7d423
--- /dev/null
+++ b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.deps.json
@@ -0,0 +1,59 @@
+{
+  "runtimeTarget": {
+    "name": ".NETCoreApp,Version=v5.0",
+    "signature": ""
+  },
+  "compilationOptions": {},
+  "targets": {
+    ".NETCoreApp,Version=v5.0": {
+      "SunnyUI.Net5.Demo/3.0.5": {
+        "dependencies": {
+          "SunnyUI": "3.0.5"
+        },
+        "runtime": {
+          "SunnyUI.Net5.Demo.dll": {}
+        }
+      },
+      "SunnyUI/3.0.5": {
+        "dependencies": {
+          "SunnyUI.Common": "3.0.5"
+        },
+        "runtime": {
+          "lib/net5.0-windows7.0/SunnyUI.dll": {
+            "assemblyVersion": "3.0.5.0",
+            "fileVersion": "3.0.5.0"
+          }
+        }
+      },
+      "SunnyUI.Common/3.0.5": {
+        "runtime": {
+          "lib/net5.0/SunnyUI.Common.dll": {
+            "assemblyVersion": "3.0.5.0",
+            "fileVersion": "3.0.5.0"
+          }
+        }
+      }
+    }
+  },
+  "libraries": {
+    "SunnyUI.Net5.Demo/3.0.5": {
+      "type": "project",
+      "serviceable": false,
+      "sha512": ""
+    },
+    "SunnyUI/3.0.5": {
+      "type": "package",
+      "serviceable": true,
+      "sha512": "sha512-0+U39GWGWBQFmoZom+UOzuST9FxsbUol5RWZgnBLzfGDlR+O4C72HjQ38u9G/SppWBswr5+dmGvFYHBA2HS4uQ==",
+      "path": "sunnyui/3.0.5",
+      "hashPath": "sunnyui.3.0.5.nupkg.sha512"
+    },
+    "SunnyUI.Common/3.0.5": {
+      "type": "package",
+      "serviceable": true,
+      "sha512": "sha512-bP9fQW8P4fJAV6FfU2Xfw3MtOduLoj/j+MRfdIn3eq9bGqDepg/w5/xqXi393Vuxvxk24eY9+5YMRVyeS+tiRg==",
+      "path": "sunnyui.common/3.0.5",
+      "hashPath": "sunnyui.common.3.0.5.nupkg.sha512"
+    }
+  }
+}
\ No newline at end of file
diff --git a/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.dll b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.dll
new file mode 100644
index 00000000..27dca2cf
Binary files /dev/null and b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.dll differ
diff --git a/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.exe b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.exe
new file mode 100644
index 00000000..ca410760
Binary files /dev/null and b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.exe differ
diff --git a/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.runtimeconfig.dev.json b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.runtimeconfig.dev.json
new file mode 100644
index 00000000..cc6de40e
--- /dev/null
+++ b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.runtimeconfig.dev.json
@@ -0,0 +1,8 @@
+{
+  "runtimeOptions": {
+    "additionalProbingPaths": [
+      "C:\\Users\\Administrator\\.dotnet\\store\\|arch|\\|tfm|",
+      "C:\\Users\\Administrator\\.nuget\\packages"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.runtimeconfig.json b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.runtimeconfig.json
new file mode 100644
index 00000000..dae617c0
--- /dev/null
+++ b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.Net5.Demo.runtimeconfig.json
@@ -0,0 +1,9 @@
+{
+  "runtimeOptions": {
+    "tfm": "net5.0",
+    "framework": {
+      "name": "Microsoft.WindowsDesktop.App",
+      "version": "5.0.0"
+    }
+  }
+}
\ No newline at end of file
diff --git a/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.dll b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.dll
new file mode 100644
index 00000000..6945d7f3
Binary files /dev/null and b/SunnyUI.Net5.Demo/bin/net5.0-windows/SunnyUI.dll differ
diff --git a/SunnyUI.Net5.Demo/bin/net5.0-windows/ref/SunnyUI.Net5.Demo.dll b/SunnyUI.Net5.Demo/bin/net5.0-windows/ref/SunnyUI.Net5.Demo.dll
new file mode 100644
index 00000000..87cb2778
Binary files /dev/null and b/SunnyUI.Net5.Demo/bin/net5.0-windows/ref/SunnyUI.Net5.Demo.dll differ
diff --git a/SunnyUI/Controls/UIListBox.cs b/SunnyUI/Controls/UIListBox.cs
index b6c65666..0bde3b71 100644
--- a/SunnyUI/Controls/UIListBox.cs
+++ b/SunnyUI/Controls/UIListBox.cs
@@ -27,6 +27,7 @@ using System.ComponentModel;
 using System.Drawing;
 using System.Drawing.Design;
 using System.Windows.Forms;
+using static System.Windows.Forms.ListBox;
 
 namespace Sunny.UI
 {
@@ -84,6 +85,22 @@ namespace Sunny.UI
             set => listbox.TextAlignment = value;
         }
 
+        [DefaultValue(SelectionMode.One)]
+        [Description("选择项所用方法"), Category("SunnyUI")]
+        public SelectionMode SelectionMode
+        {
+            get => listbox.SelectionMode;
+            set => listbox.SelectionMode = value;
+        }
+
+        [DefaultValue(SelectionMode.One)]
+        [Description("选择项所用方法"), Category("SunnyUI")]
+        public SelectedIndexCollection SelectedIndices
+        {
+            get => listbox.SelectedIndices;
+        }
+
+
         protected override void OnContextMenuStripChanged(EventArgs e)
         {
             base.OnContextMenuStripChanged(e);
@@ -737,12 +754,14 @@ namespace Sunny.UI
         protected override void OnMouseMove(MouseEventArgs e)
         {
             base.OnMouseMove(e);
+            if (SelectionMode != SelectionMode.One) return;
             MouseIndex = IndexFromPoint(e.Location);
         }
 
         protected override void OnMouseLeave(EventArgs e)
         {
             base.OnMouseLeave(e);
+            if (SelectionMode != SelectionMode.One) return;
             MouseIndex = -1;
         }
     }