Update README.md

Author: yanjinhuagood

README.md

@@ -86,6 +86,11 @@ xmlns:wd="https://github.com/WPFDevelopersOrg/WPFDevelopers"
 
 <img src="https://github.com/WPFDevelopersOrg/ResourcesCache/raw/main/resources/WPFDevelopersResource/DateRangePicker.gif"/>   
 
+----------
+### Drawer
+
+<img src="https://github.com/WPFDevelopersOrg/ResourcesCache/raw/main/resources/WPFDevelopersResource/Drawer.gif"/>   
+
 ----------
 ### Spacing