private void ToolbarItem_OK_Activated(object sender, EventArgs e)
        {
            var AllAddresses = App.AllServerAddresses.Value.Split(new string[] { "|" }, StringSplitOptions.RemoveEmptyEntries)
                               .Select(a => new
            {
                Address  = a.Split('_')[0],
                Selected = Convert.ToBoolean(a.Split('_')[1])
            }).ToArray();

            if (ServerAddress.Text == "")
            {
                App.ShowError("خطا", "آدرس وارد شده معتبر نیست.", "خوب");
                return;
            }

            if (EditingAddress == "")//Insert
            {
                if (AllAddresses.Any(a => a.Address == ServerAddress.Text.ReplacePersianDigits()))
                {
                    App.ShowError("خطا", "آدرس وارد شده به ثبت رسیده است.", "خوب");
                    return;
                }

                AllAddresses = AllAddresses.Select(a => new
                {
                    Address  = a.Address,
                    Selected = false
                }).Union(new[] { new
                                 {
                                     Address  = ServerAddress.Text.ReplacePersianDigits(),
                                     Selected = true
                                 } }).ToArray();
            }
            else//Update
            {
                AllAddresses = AllAddresses.Select(a => new
                {
                    Address  = a.Address == EditingAddress.ReplacePersianDigits() ? ServerAddress.Text.ReplacePersianDigits() : a.Address,
                    Selected = a.Selected
                }).ToArray();
            }

            App.AllServerAddresses.Value = AllAddresses.Any() ? AllAddresses.Select(a => a.Address + "_" + a.Selected.ToString()).Aggregate((sum, x) => sum + "|" + x) : "";
            App.ServerAddress            = AllAddresses.First(a => a.Selected).Address;

            SettingsForm_ServerAddress.RefreshAddressList();
            try { Navigation.PopAsync(); } catch (Exception) { }
        }