Hi Beck,
Thanks for this detailed information. It is possible to turn off displaying error lines when using ) alone, while using C# configuration in Edit control by removing the Type="Error" property in the config.xml.
Please refer the code snippets and sample below for the correct behaviour.
[Config.xml]
IsCollapsable="false" CollapseName="(...)">
http://websamples.syncfusion.com/samples/Edit/F69677/main.htmPlease try this and let me know if this helps.
Regards,
Fathima