update README.md.

冰封一夏 · Gitee
Commit e1265533 由 冰封一夏 编写于 2020-05-14 16:45:17 +0800 由 Gitee 提交于 2020-05-14 16:45:17 +0800
README.md
--- a/README.md
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@@ -37,6 +37,10 @@ Welcome to exchange discussion: [Click to join QQ group 568015492](//shang.qq.co
 Install-Package HZH_Controls
 ```

+``` csharp
+The content listed below is only part of the control, more control effects, please download the source code to see the demo running effect!
+```
+
 ![输入图片说明](https://images.gitee.com/uploads/images/2019/0903/084635_85b9e4a3_301547.gif "1.gif")
 ![输入图片说明](https://images.gitee.com/uploads/images/2019/0903/084848_9aaca7d2_301547.gif "3.gif")