I have a .Net Framework 4 Web Project which works properly before I add a webservice into it. Then I created a Web Form with Master Page but I can't see the asp:Content section in the Design Mode. There was no available Standard toolbox items in the toolbox as you can see in the picture: Image1 (Can't add images because of lack of reputation)
Then I tried a create a fresh new Web Form for getting rid of and master page related errors but Standard toolbox items were not visible again.
Things I've tried so far:
After a long time googling , and mostly all answers - revolving around
Reset Toolbar Delete .tbd files from C:\Users(your user)\AppData\Local\Microsoft\VisualStudio\11.0 Using devenv.exe /SafeMode & devenv.exe /ResetSettings. None of them working out for me, making me more sick.
There is something I did which worked and thought it's worth sharing if it helps someone.
I followed all of the above steps, failing . I did Step 1 & 2 with my project (in VS 2012) open and
Right Click on Toolbox > Choose Items > Pressed Reset > ok. Then again, Right Click on Toolbox > Add Tab > 'gave it some name' > then again Reset Toolbox There was some screen flash/flickering - some loading .
And to my surprise the Grey life ( grey controls ) were now available .
Hope this helps someone like me! :)