If you are using NuGet packages, available in the Sitefinity CMS Nuget repository, to avoid issues, you must use the following procedure, instead of using the Project Manager.
IMPORTANT: Before you begin, make sure that your project is not located in a folder that has any special characters in the name, such as ~\Program Files (x86).
~\Program Files (x86)
If you have NuGet packages installed in your project, to upgrade it, perform the following:
IMPORTANT: Perform this step, only if you are upgrading from a Sitefinity CMS version 9.1 or below to a Sitefinity CMS version 9.2 or above. This step is required when you change the .NET framework from 4.0 to 4.5.
NOTE: You do this, because the changing the target framework requires re-installation of all packages. After you have removed all Sitefinity CMS related packages in Step 2, you perform this step to re-install all other packages that you may have installed on your system.
NOTE: The BCL dependency used by Sitefinity CMS to integrate Azure search in previous versions is also removed. As a result, you can safely remove the Tools folder under the root of your SitefinityWebApp project.
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