Create Connection String Outside VS

 Step 1: Open Notepad and click File-Save As-Test.Udl. Try to save the file format as UDL



Step 2: Open the file and select SQL Server, followed by a username and a password.Once Authentication is done. We have to select the database, we want:

Step 3: Click the Test Connection and subsequently click OK:



Step 4: Open the file as a text file (use right click and choose open with Notepad.