I have a .NET 5 WPF project, which connects to an another projects in the same solution. If I want to load any data from the DB, I get an error:
System.Data.Entity.Core.EntityException: 'The underlying provider failed on ConnectionString.' ArgumentException: Invalid value for key 'attachdbfilename'.
The connection string:
<add name="Booking_DatabaseEntities"
connectionString="metadata=res://*/Booking_Model.csdl|res://*/Booking_Model.ssdl|res://*/Booking_Model.msl;provider=System.Data.SqlClient;provider connection string="data source=(LocalDB)\MSSQLLocalDB;attachdbfilename=|DataDirectory|\Booking_Database.mdf;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework""
providerName="System.Data.EntityClient"/>
In the same solution there is a command line projects, which uses the same connection string, but it is working correctly and can use this DB.
Do you have any idea to solve this error?
