A bug in vs.net

These days, I encountered a headache. When I wrote An ASPX page using vs.net, intelliisense suddenly failed to be used and cannot be undone or redone. Just press Enter,CodeIt becomes messy. Restarting the solution, restarting the system, and reinstalling the system do not work. Today, visual. Assist. NET is installed, and that's all!

I have been searching for the Internet for a long time, but I have not found the reason, but here is an articleArticleSpeaking of a bug in the vs.net Editor, it is also a problem that the intelliisense is invalid.
Http://www.codeproject.com/buglist/intellisense.asp

In addition, a problem with visual. Assist. Net was discovered: visual. Assist. Net option -----> info ----> show
When the content and definition window settings are not selected, the original display class and method combo box in the vs.net editor cannot be displayed.