How to call two insert queries on one button in click in asp.net C#

 protected void Unnamed_Click(object sender, EventArgs e)

    {

        //TextBox t = DetailsView1.FindControl("TextBox1") as TextBox;

        string conStr = ConfigurationManager.ConnectionStrings["testdbConnectionString"].ConnectionString;

        using (SqlConnection con = new SqlConnection(conStr))

        {

            if (ddlSelect.SelectedValue == "1")

            {

                abc(txt1.Text, con);

            }

            if (ddlSelect.SelectedValue == "2")

            {

                abc(txt1.Text, con);

                abc(TextBox2.Text, con);

            }

}

}

void abc(string value, SqlConnection con)

    {

        SqlCommand cmd = new SqlCommand();

        cmd = new SqlCommand("INSERT INTO BookMaster(BookName) VALUES (@BookName)", con);

        cmd.CommandType = CommandType.Text;

        cmd.Parameters.AddWithValue("@BookName", value);

        con.Open();

        cmd.ExecuteReader();

        con.Close();

    }