// метод виконується по завершенню backgroundWorker_DoWork
private void backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
MinimumSize = new Size(256, 256);
dateTime = weather.LastUpdate ?? DateTime.Now;
labelCity.Text = weather.Сity;
labelDate.Text = dateTime.ToShortDateString();
labelTime.Text = dateTime.ToShortTimeString();
pictureBoxIcon.Image = weather.Icon;
labelTemperature.Text = weather.GetTemperature();
labelComment.Text = weather.Comment;
labelRange.Text = weather.GetMinMaxTemperature();
SetForecastControls(labelFirstDay, pictureBoxFirst, labelFirstTemperature, 1);
SetForecastControls(labelSecondDay, pictureBoxSecond, labelSecondTemperature, 2);
SetForecastControls(labelThirdDay, pictureBoxThird, labelThirdTemperature, 3);
mainPanel.Visible = true;
mainPanel.BringToFront();
toolTip.SetToolTip(buttonUpdate, DateTime.Now.ToShortTimeString());
toolStripMenuItemSettings.Enabled = true;
Refresh();
MinimumSize = Size;
}