private void dtp_pay_Date_ValueChanged(object sender, EventArgs e)
{
try
{
DataSaver ds = new DataSaver(login_, password_);
tb_pay_SummRUB.Text = ds.GetRUSsumm(tb_pay_Summ.Text
, cb_pay_Currency.SelectedValue.ToString()
, dtp_pay_Date.Value.Date.ToString()
);
}
catch { }
}