Cannot import anymore tables into edmx. "Running transformation: System.NullReferenceException: Object reference not set to an instance of an object."

Question

Does this answer your question? [What is a NullReferenceException, and how do I fix it?](https://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it) — Timothy G., Jun 02 '23 at 13:25
Fixed in future versions of VS: https://developercommunity.visualstudio.com/t/Cannot-import-anymore-tables-into-edmx/10368835 — Sven, Jun 06 '23 at 09:58

score 13 · Accepted Answer · edited Jun 08 '23 at 07:55

Go to

C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\Extensions\Microsoft\Entity Framework Tools\Templates\Includes

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);

to

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

This worked, what is it doing? – Jonathan Bick Jun 26 '23 at 15:43 — Jonathan Bick, Jun 26 '23 at 15:43

Cannot import anymore tables into edmx. "Running transformation: System.NullReferenceException: Object reference not set to an instance of an object."

1 Answers1

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