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Home/ Questions/Q 6922677
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Editorial Team
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Editorial Team
Asked: May 27, 20262026-05-27T10:26:13+00:00 2026-05-27T10:26:13+00:00

I am developing web based application using asp.net and ajax . Today I am

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I am developing web based application using asp.net and ajax. Today I am facing an issue, while dragging and dropping the ajax based components under the ajax enabled webform.

The error message is

The operation could not be completed. Invalid FORMATETC structure

If your answer is assembly then please let me know which assembly such issues (be specific about assemblies)

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  1. Editorial Team
    Editorial Team
    2026-05-27T10:26:14+00:00Added an answer on May 27, 2026 at 10:26 am

    It is basically due to Ajax Toolkit assembly if you have added it as toolbox. Only way to get rid of this is to restart your IDE , whenever your have Formatetc error , or unload the toolbox and recreate it. Either of them will solve the. But it will not go. Occurance will become rare. Hope this help.

    Ajax toolkit version < 3.5 seen such bugs.

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