An attempt to attach an auto-named database for file C:\Invoicing.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
ObjConnection.ConnectionString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=C:\\Invoicing.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True";
var
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