There are 2 ways you can do this:
1. using the ExecuteReader method with "CommandBehavior.CloseConnection" parameter
2. Putting the Connection object with Using statement
The following are the best practices you can follow for an interview:
1. Be neatly dressed (Tucked in, with Tie, Shoes, Beared shaved)
2. Go well before the time
3. Carry additional copies of the documents mentioned by recruiter along with resume
4. Start with a Good Morning (or time based) and end with a Thank you
5. Give a good positive handshake
6. Be well prepared Technically
7. Sharpen your communication skills before interview
8. Have a model interview with your friend or colleague or at home
9. Gather information about the company and have good idea about them
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