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VS2022, ver. 17.6.2 – EntityFramework6 Broken

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6 Jun 2023CPOL 6.8K   2   2
Fix for adding new DB tables does not work in VS 2022, ver. 17.6.2, EF6 (Classic)
In Visual Studio 2022, ver. 17.6.2, Entity Framework 6 (Classic) is broken, adding new DB tables in the “Database-First” approach does not work. We are showing how to manually fix it.


  • In Visual Studio 2022, ver. 17.6.2, Entity Framework 6 (Classic) is broken, adding new DB tables in the “Database-First” approach does not work.
  • You get build error:
    Running transformation: System.NullReferenceException: 
    Object reference not set to an instance of an object.

Image 1


Seems like a bug in Visual Studio 2022, ver. 17.6.2.

Manual Fix

I tried steps from [1] by Chirag Prajapati and they worked:

Start Notepad in administrator mode, and open the file 
(substituting Community for Professional or Enterprise depending on your version):
C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\Extensions\
Microsoft\Entity Framework Tools\Templates\Includes\EF6.Utility.CS.ttinclude

Update the following code in DynamicTextTransformation (approx line 1920) and change:

_generationEnvironment = type.GetProperty("GenerationEnvironment", 
                         BindingFlags.Instance | BindingFlags.NonPublic);


_generationEnvironment = type.GetProperty("GenerationEnvironment", 
BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);

Click to enlarge image

Click to enlarge image


Will please somebody post when that bug is fixed?



  • 6th June, 2023: Initial version


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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Comments and Discussions

QuestionEntityFrameWork6 Broken Pin
vladimir Cavalcanti7-Jun-23 6:00
vladimir Cavalcanti7-Jun-23 6:00 
QuestionI see Pin
BorisL20007-Jun-23 1:01
BorisL20007-Jun-23 1:01 
I ran into a similar situation in VS2019 when I worked for Epicor Software Corporation. They had a big project and it each time fellon compilations. Moreover, the earlier version worked fine, and subsequent updates broke everything. It was simply useless to contact their technical support, some Vietnamese roofing felts or Filipinos worked there and they all the time pretended that they did not understand you. Complete ass, if I may say so.

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