private void SQLServer_adreress_textBox1_KeyDown(object sender, KeyEventArgs e)
 {
     if (e.KeyCode == Keys.Enter)
     {
         string userName = System.Environment.UserName;
         if (SQLServer_adreress_textBox1.ToString().Contains(@"\SQLEXPRESS"))
         {
             File.WriteAllText(@"C:\Users\" + userName + @"\Documents\DataSource.txt", SQLServer_adreress_textBox1.Text);
             MessageBox.Show("Database Server Address successfully saved");
             SystemAccessBLL aSyatemAccessBLL = new SystemAccessBLL();
             dt = aSyatemAccessBLL.CheckSystemAccessBLL();
             srvrs_addresspanel20.Visible = false;
         }
         else
         {
             SQLServer_adreress_textBox1.Text = "";
             MessageBox.Show("Insert Correcr SQL Server Address");
         }
     }
 }
        private void LoginUI_Load(object sender, EventArgs e)
        {
            string userName = System.Environment.UserName;

            try
            {
                if (File.ReadAllText(@"C:\Users\" + userName + @"\Documents\DataSource.txt") != "")
                {
                    srvrs_addresspanel20.Visible = false;
                    SystemAccessBLL aSyatemAccessBLL = new SystemAccessBLL();
                    dt = aSyatemAccessBLL.CheckSystemAccessBLL();
                    this.ActiveControl = LoginUI_UserNametextBox2;
                }
            }
            catch
            {
                srvrs_addresspanel20.Visible = true;
                this.ActiveControl           = SQLServer_adreress_textBox1;
            }
        }
        private void AttachDatabaseAddressbutton9_Click(object sender, EventArgs e)
        {
            string userName = System.Environment.UserName;

            if (SQLServer_adreress_textBox1.ToString().Contains(@"\SQLEXPRESS"))
            {
                File.WriteAllText(@"C:\Users\" + userName + @"\Documents\DataSource.txt", SQLServer_adreress_textBox1.Text);
                MessageBox.Show("Database Server Address successfully saved");
                SystemAccessBLL aSyatemAccessBLL = new SystemAccessBLL();
                dt = aSyatemAccessBLL.CheckSystemAccessBLL();
                srvrs_addresspanel20.Visible = false;
                Loginpanel2.Visible          = true;
                panel1.Visible = true;
            }
            else
            {
                SQLServer_adreress_textBox1.Text = "";
                MessageBox.Show("Insert Correcr SQL Server Address");
            }
        }