I test again after configure number port and install new driver/provider ADO .
A) check step
In the process only the button test do the check , if we enter the value source without use Database login, there is no chek !
In some case manifold create this value after using Database Login check even after error !
B) value string
manifold """data source=(LocalDB);integrated security=sspi;initial catalog=MSSQLLocalDB;""""
Microsoft """Source=(LocalDB)\\MSSQLLocalDB;Integrated Security=true;AttachDbFileName=C:\\master.mdf; """
I think the variable name and value differ from ADO and SQL driver !
the Link is name " Install SQL Server" what i need is the second step configure not SQL server , not SQL Server Express but MSSSQLLocal !
C) using ado i have a differents information about same value using ADO ( number of reverse slash )
D) install SQL Server
LinqPad install MSSQLLocal by itself ( implicitly , hidden way ) So i don't need to go to the steps for install and configure "SSQL database" .All already work inside Linqpad. And Yes i install SqlLocalDB.msi to have access to CLI SqlLocalDB.exe.
I do something wrong but don't know where !!
union, doc , APIand most important deepl & keyboard shortcut