Ошибка при выводе цены из бд в label

В общем и целом пишу курсач.

Вот весь код формы:

using CloudServer.Classes;
using MySqlConnector;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Globalization;
using System.Linq;
using System.Reflection.Emit;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace CloudServer.Forms
{
public partial class FormVPS : Form
{
public FormVPS()
{
InitializeComponent();
randText();
}

private void FormVPS_Load(object sender, EventArgs e)
{
randText();
clearfields();
pricevalue_disc();
pricevalue_2xRam();
}

public void randText()
{
Random rand = new Random();
for (int i = hostname.randNames.Count; i > 0; i--)
{
int flag = rand.Next(hostname.randNames.Count);
hostnameTextBox.Text = (hostname.randNames[flag]);
hostnameTextBox.PlaceholderText = (hostname.randNames[flag]);
hostname.randNames.RemoveAt(flag);
}
}

private void pricevalue_disc()
{
DB db = new DB();
db.openConnection();
var RePriceval1 = $"select price from services where `services`.`service_name` = 'xeon discount'";
var RePriceval3 = $"select price from services where services.service_name = 'xeon 10gbps'";
var pr1 = new MySqlCommand(RePriceval1, db.getConnection());
var pr3 = new MySqlCommand(RePriceval3, db.getConnection());

MySqlDataReader reader1 = pr1.ExecuteReader();
//MySqlDataReader reader3 = pr3.ExecuteReader();
while (reader1.Read())
{
xeon_disc_val.Text = reader1[0].ToString() + rub1lbl.Text;
}

//while (reader3.Read())
//{
// xeon10gbps_val.Text = reader3[2].ToString() + rub3lbl.Text;
//}
db.closeConnection();
}

private void pricevalue_2xRam()
{
DB dB = new DB();
dB.openConnection();
var RePriceval2 = $"select price from services where services.service_name = 'xeon 2x ram'";
var pr2 = new MySqlCommand(RePriceval2, dB.getConnection());
MySqlDataReader reader2 = pr2.ExecuteReader();
while (reader2.Read())
{
xeon2xRam_val.Text = reader2[1].ToString() + rub2lbl.Text;
}
dB.closeConnection();
}

private void clearfields()
{
xeon_disc_val.Text = string.Empty;
xeon2xRam_val.Text = string.Empty;
xeon10gbps_val.Text = string.Empty;
rub1lbl.Visible = false;
rub2lbl.Visible = false;
rub2lbl.Visible = false;
rub3lbl.Visible = false;
}

}
}

CSHARP

using CloudServer.Classes;

using MySqlConnector;

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Globalization;

using System.Linq;

using System.Reflection.Emit;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;



namespace CloudServer.Forms

{

    public partial class FormVPS : Form

    {

        public FormVPS()

        {

            InitializeComponent();

            randText();

        }



        private void FormVPS_Load(object sender, EventArgs e)

        {

            randText();

            clearfields();

            pricevalue_disc();

            pricevalue_2xRam();

        }



        public void randText()

        {

            Random rand = new Random();

            for (int i = hostname.randNames.Count; i > 0; i--)

            {

                int flag = rand.Next(hostname.randNames.Count);

                hostnameTextBox.Text = (hostname.randNames[flag]);

                hostnameTextBox.PlaceholderText = (hostname.randNames[flag]);

                hostname.randNames.RemoveAt(flag);

            }

        }



        private void pricevalue_disc()

        {

           DB db = new DB();

            db.openConnection();

            var RePriceval1 = $"select price from services where `services`.`service_name` = 'xeon discount'"; 

            var RePriceval3 = $"select price from services where services.service_name = 'xeon 10gbps'";

            var pr1 = new MySqlCommand(RePriceval1, db.getConnection());

            var pr3 = new MySqlCommand(RePriceval3, db.getConnection());

            

            MySqlDataReader reader1 = pr1.ExecuteReader();

            //MySqlDataReader reader3 = pr3.ExecuteReader();

            while (reader1.Read())

            {

                xeon_disc_val.Text = reader1[0].ToString() + rub1lbl.Text;

            }

            

            //while (reader3.Read())

            //{

            //    xeon10gbps_val.Text = reader3[2].ToString() + rub3lbl.Text;

            //}

            db.closeConnection();

        }



        private void pricevalue_2xRam()

        {

            DB dB = new DB();

            dB.openConnection();

            var RePriceval2 = $"select price from services where services.service_name = 'xeon 2x ram'";

            var pr2 = new MySqlCommand(RePriceval2, dB.getConnection());

            MySqlDataReader reader2 = pr2.ExecuteReader();

            while (reader2.Read())

            {

                xeon2xRam_val.Text = reader2[1].ToString() + rub2lbl.Text;

            }

            dB.closeConnection();

        }



        private void clearfields()

        {

            xeon_disc_val.Text = string.Empty;

            xeon2xRam_val.Text = string.Empty;

            xeon10gbps_val.Text = string.Empty;

            rub1lbl.Visible = false;

            rub2lbl.Visible = false;

            rub2lbl.Visible = false;

            rub3lbl.Visible = false;

        }



    }

}

Класс для присоединения к бд:

using MySqlConnector;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CloudServer
{
internal class DB
{
private MySqlConnection connection;

public void openConnection()
{
connection = new MySqlConnection("server=localhost;port=3306;username=root;password=root;database=cloudserver");
if (connection.State == System.Data.ConnectionState.Closed)
connection.Open();
}

public void closeConnection()
{
if (connection.State == System.Data.ConnectionState.Open)
connection.Close();
connection.Dispose();
}

public MySqlConnection getConnection()
{
return connection;
}

}
}

CSHARP

using MySqlConnector;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;



namespace CloudServer

{

    internal class DB

    {

        private MySqlConnection connection;



        public void openConnection()

        {

            connection = new MySqlConnection("server=localhost;port=3306;username=root;password=root;database=cloudserver");

            if (connection.State == System.Data.ConnectionState.Closed)

                connection.Open();

        }



        public void closeConnection()

        {

            if (connection.State == System.Data.ConnectionState.Open)

                connection.Close();

                connection.Dispose();

        }



        public MySqlConnection getConnection()

        {

            return connection;

        }



    }

}

При заходе на форму выдает данную ошибку:

Ошибка