Update README.md

Author: yanjinhuagood

README.md

@@ -97,6 +97,16 @@ xmlns:wd="https://github.com/WPFDevelopersOrg/WPFDevelopers"
 
 `xmlns:wd="https://github.com/WPFDevelopersOrg/WPFDevelopers"`
 
+----------
+### IconicThumbnail
+
+<img src="https://github.com/WPFDevelopersOrg/ResourcesCache/raw/main/resources/WPFDevelopersResource/IconicThumbnail.gif"/>   
+
+----------
+### Snap
+
+<img src="https://github.com/WPFDevelopersOrg/ResourcesCache/raw/main/resources/WPFDevelopersResource/Snap.gif"/>   
+
 ----------
 ### NavScrollPanel