Here is the end all be all answer to fix this frustrating issue.
from run command, run the following command:
devenv /resetsettings
This resets the IDE back to first time use and will again allow you to Debug...... Finally!!!!!!!!!!
from run command, run the following command:
devenv /resetsettings
This resets the IDE back to first time use and will again allow you to Debug...... Finally!!!!!!!!!!
試了,還是不行