Some days ago my designer started to show "Error creating control - [controlname] Value cannot be null. Parameter name: parseText" instead of all of my server side controls in all of my web projects - including both framework 2.0 and 4.0 projects. I tried many tips I found on the net, including restarting VS, cleaning the temporary asp.net folders and even I reinstalled the whole VS pack, but I still get the same error.
This occures in both VS 2010 and Microsoft Expression Web 4.
Any help appreciated.
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