typeinitialiseringsfunktionen for 'system.data.sqlclient.sqlconnection' threw an exeption

Question

The error occurs in a windows forms application.
It occurs when running the application on windows 11.
The application is developed using Visual studio 2013.
Sql Server data tools 12.0.41012.0

Isn't windows 11 supporting ?

Answer 1

Hi @Ravnø Data ,
It may be the problem with app.config settings.
You need to check your code in app.config file with a format similar to the following..

<appSettings>  
<add key ="ConnectionString" value="Data Source=server name;Initial Catalog=db name;User ID= sa;Password= sa"/>  
</appSettings>  

If you code this wrongly, typeintialiser error will throw.
Also if the key name is used different from app.config, also exception will throw.
Best Regards.
Jiachen Li

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Answer 2

It's a windows forms application.
Developed in Visual Studio 2013
.net framework 4.5
When the application runs, it connects to a mssql database

It runs without problems on windows 10, but not on windows 11