You are able to change the FreezePane splitter line's appearance from designer.
In this topic, you will learn how to set the splitter line's appearance.
To change splitter line's appearance
- Enable column freezing.
 - Open WebGrid.NET designer.
 - Search for FreezePaneSettings.
 - Set SplitterLineColor to ForestGreen.
 - Set SplitterLineWidth to 5.
 
