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.
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