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Version upgrade causing many build errors after the fact
posted

I used the Version Utility to upgrade from 14.2 to 18.2 and made sure no references to 14.2 exist anywhere in the solution's projects.  However, the following errors appear for many of the designer controls.

Error CS0012 The type 'UltraTabControl' is defined in an assembly that is not referenced. You must add a reference to assembly 'Infragistics4.Win.UltraWinTabControl.v14.2, Version=14.2.20142.2168, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb'. <FileName>.Designer.cs

Error CS0012 The type 'UltraTabSharedControlsPage' is defined in an assembly that is not referenced. You must add a reference to assembly 'Infragistics4.Win.UltraWinTabControl.v14.2, Version=14.2.20142.2168, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb'. <FileName>.Designer.cs

I tried cleaning, rebuilding, removing any cached folders and files, restarting Visual Studio several times, but nothing is helping.  The toolbox also shows controls for both 14.2 and 18.2.  The designer won't open because of all the underlying errors.