private void OpenLogBtn(object sender, RoutedEventArgs e) { OpenFileDialog of = new OpenFileDialog() { Filter = "Log File|*.log" }; if (of.ShowDialog() == true) { if (File.Exists(of.FileName)) { Loger = Loger.Load(of.FileName); if (Loger != null) { DrawHistograms.Draw(Loger, PrimePanelKey, PrimePanelMouse); } } } }