Using SqlCommand and AddWithValue Parameters To Execute SQL Insert

public bool PollCastVote(int PollAnswerID)

        bool returnValue = false;

        Guid userID = Guid.NewGuid();
        DateTime dateTimeStamp = DateTime.Now;

        // connection string
        string connectionString = ConfigurationManager.ConnectionStrings["PollConnectionString"].ConnectionString;

        // Sql connection object initialized with connection string used to connect
        using (SqlConnection mySqlConnection = new SqlConnection(connectionString))
                // open the Sql connection

                // Sql Command object initialized with SQL INSERT
                SqlCommand mySqlCommand = new SqlCommand("INSERT INTO PollUserResponses (UserID, PollAnswerID, DateTimeStamp) VALUES (@UserID, @PollAnswerID, @DateTimeStamp)", mySqlConnection);
                mySqlCommand.Parameters.AddWithValue("@UserID", userID);
                mySqlCommand.Parameters.AddWithValue("@PollAnswerID", PollAnswerID);
                mySqlCommand.Parameters.AddWithValue("@DateTimeStamp", dateTimeStamp);

                // Execute

                returnValue = true;

            catch (Exception ex)

                // close the Sql Connection

            return returnValue;


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