private void button1_Click(object sender, EventArgs e)
            {
                conn.Open();
                //SQL Command
                OleDbCommand cmd = conn.CreateCommand();
                cmd.CommandType = CommandType.Text;
                //cmd.CommandText = "insert into OhFlowers(FirstName,LastName,UserName,Email,PromotionalMaterial,BusinessType)values('" + textBox1.Text + "', '" + textBox4.Text + "', '" + textBox3.Text + "','" + textBox2.Text + "', '"  + txtPromo.Text + "', '" + txtBusType.Text + "')";
                cmd.CommandText = "insert into OhFlowers(FirstName,LastName,UserName,Email,PromotionalMaterial,BusinessType)values(@FirstName,@LastName,@UserName,@Email,@PromotionalMaterial,@BusinessType)";
                cmd.Parameters.AddWithValue("@FirstName", textBox1.Text);
                cmd.Parameters.AddWithValue("@LastName", textBox2.Text);
                cmd.Parameters.AddWithValue("@UserName", textBox3.Text);
                cmd.Parameters.AddWithValue("@Email", textBox4.Text);
                cmd.Parameters.AddWithValue("@PromotionalMaterial", txtPromo.Text);
                cmd.Parameters.AddWithValue("@BusinessType)", txtBusType.Text);
                cmd.ExecuteNonQuery();
            
                conn.Close();
             
                this.Close();
            }
        }