private void button1_Click(object sender, EventArgs e)
        {
            string cyType = comboBox1.Text;

            using (CustomerMgntRef.CustomerMgntClient client = new CustomerMgntRef.CustomerMgntClient())
            {
                var result = client.GetCustomers(cyType);
                label5.Text = result.Count().ToString();
                dataGridView1.DataSource = result;
            }
        }
        private void CustomerRegister_Load(object sender, EventArgs e)
        {
            Location = new System.Drawing.Point(-7, 50);
            int w = SystemInformation.VirtualScreen.Width + 14;
            int h = SystemInformation.VirtualScreen.Height - 43;

            Size = new Size(w, h);

            using (CustomerMgntRef.CustomerMgntClient client = new CustomerMgntRef.CustomerMgntClient())
            {
                string[] installs = client.GetCustomersTypes().Distinct().ToArray();
                comboBox1.Items.Add("");
                comboBox1.Items.AddRange(installs);
            }
        }