User-1454326058 posted
Hi Robert,
Thanks for your post!
First, please make sure the Edit and Continue was enabled in the web project properties.
About enable Edit and Continue, please refer to:
http://blogs.msdn.com/b/webdevelopertips/archive/2008/11/26/tip-29-did-you-know-how-to-enable-edit-and-continue-feature-for-web-application-projects.aspx
Please refer to this link below to check whether your environment is matched or not.
# Edit and Continue
http://msdn.microsoft.com/en-us/library/bcew296c(v=vs.100).aspx
Note:
If IntelliTrace is enabled and you collect both IntelliTrace events and call information, Edit and Continue is disabled. For more information, see
Configure IntelliTrace Collection for Debugging in Visual Studio.
On the other hand, please try to create a new project and try again.
If you still have the issue, please provide the details of your project and Tool.
Thanks
Best Regards