I know this is just an example that you presented in the article. So I have a recommedation ( learnt over time).

When you are working with connections to the database using the command object, I would sincerely recommend the following technique . The following practice will keep the connection pool in better control:

Instead of myCommand.Open(); or myCommand.Close(); directly

Use this while opening connections:

    if( myCommand.Connection.State == ConnectionState.Closed)
            myCommand.Open();

Use this while closing connections:

    if( myCommand.Connection.State == ConnectionState.Open)
            myCommand.Close();