SqlConnection

Pls see code attached.
Do I need to write cnn.Close() and  cnn.Dispose() statements in that code or the statement

using (var cnn = new SqlConnection(MyConnection)){}

Select allOpen in new window

takes care of it automatically?

Thanks.

using (var cnn = new SqlConnection(MyConnection))
        {
            using (var cmd = new SqlCommand("[mySchema].[UpdateComments]", cnn))
            {
                cmd.CommandType = System.Data.CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@comment", comment);
               cnn.Open();
                cmd.ExecuteNonQuery();
            }
            cnn.Close();
            cnn.Dispose();
        }

Select allOpen in new window