![]() Make sure the connection string includes the correct provider, server, database name, and authentication details.ĭisable third-party extensions: Temporarily disable any third-party extensions that might interfere with the Entity Framework template generation process. This error can occur for various reasons, here are a few suggestions to troubleshoot and resolve the issue:Ĭheck the connection string: Ensure that the connection string in your application's configuration file (Web.config or App.config) is correctly configured to point to the localdb SQL Server file (School.mdf). The error you're experiencing seems to be related to the Entity Framework's code generation process for the ADO. DynamicTextTransformation.get_GenerationEnvironment()Īt .EntityFrameworkTemplateFileManager.ctor(Object textTransformation)Īt .(Object textTemplating)Īt .EntityFrameworkTemplateFileManager.Create(Object textTransformation) Microsoft Visual Studio Enterprise 2022 (64 位元) - Current ![]() Please help and thanks in advance! The environment and error code are as following: I even re-installed my Windows but with no luck. This process worked before and for some reasons it keeps generating the same error. I've not put any code into the the project yet and re-installed Visual Studio a couple of times and the error still exists. Net Entity Data Model into the Model folder and always received the System.NullReferenceException error. I then added a table(Student) with only two attributes for testing. I created a localdb sql server file(School.mdf) in the App_Data folder in an MVC project using.
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