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:
- Removed the web service
- Undo pending changes
- Created a new web form which don't use a master page
- Created a fresh web project
- Resetted settings via Tools > Import and Export Settings
- Resetted via command line devenv /ResetSettings, devenv /ResetSkipPkgs
- Repaired Visual Studio via installation .iso
- UPDATE 1 I've also tried to add a label from source view as mentioned in this question. When I switched to design mode it throwed an error: "Error creating control" Image2
I think this is a project related problem but I'm not sure. The weird thing is some of the old items like an ascx control allow me to add Standard toolbox items but nothing newly created items are allowed me to do this. How can i resolve this issue?
Thanks in advance,