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While working on the current project I needed to use some controls from the ajax control toolkit, so I added a reference to it's dll file to the project and to the Toolbox. Unfortunatelly, when I wanted to drag some controls to the page, I had messagebox with the error in the topic. What was strange, in other new website project, there everything worked ok.

After a few minutes on google, I found some solutions: link

In my case unload and load again a project (without restarting VS) with UI helped.

Posted on Friday, January 1, 2010 2:37 PM ASP.NET | Back to top


Comments on this post: The operation could not be completed. Invalid FORMATETC structure

# re: The operation could not be completed. Invalid FORMATETC structure
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design mode is not coming in the asp.net website page
Left by vamsi on Sep 25, 2010 8:14 AM

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