private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            dataBase = new ProgramLogicDll.ConnectDb();
            int Id       = int.Parse(comboBox1.SelectedItem.ToString());
            var computer = dataBase.Computers.Where(computerId => computerId.ComputerId == Id).FirstOrDefault();

            textBox1.Text = computer.GraphicsCard;
            textBox2.Text = computer.Processor;
            textBox3.Text = computer.RAM.ToString();

            foreach (var item in dataBase.Computers.Where(computerId => computerId.ComputerId == Id).FirstOrDefault().Softwares)
            {
                listBox2.Items.Add(item.Name);
                softwares.Add(item);
            }
            foreach (var item in dataBase.Softwares)
            {
                bool check = true;
                foreach (var item1 in listBox2.Items)
                {
                    if (item1.ToString() == item.Name)
                    {
                        check = false;
                        break;
                    }
                }
                if (check == true)
                {
                    listBox1.Items.Add(item.Name);
                }
            }
        }