I get the following error, even though I've verified that exact assembly is in the GAC:
Parser Error Message: Could not load file or assembly 'Infragistics35.WebUI.WebSpellChecker.v10.3, Version=10.3.20103.1013, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb' or one of its dependencies. The system cannot find the file specified.
<add assembly="Infragistics35.WebUI.WebSpellChecker.v10.3, Version=10.3.20103.1013, Culture=neutral, PublicKeyToken=7DD5C3163F2CD0CB"/>
Hello mtginfragistics,
You can try the following steps in order to resolve this issue:
Make sure that the file (same version and same build as inserted in web.config) is available in your GAC or in your Bin folder.
Make sure that you have cleared all temporary files that points to the different versions of the controls.
Clear the content of the licenses.licx and rebuild the project again.
Restart Visual Studio (sometimes the assemblies are kept in memory).
Let me know if you need further assistance with this question.
Let me know if you have any further questions.