UserEfficiencyTracker.DailyProductivityPopUp.ShowDialog C# (CSharp) Méthode

        public new bool? ShowDialog()
        {
            const int windowWidth = 510; //this.ActualWidth;
            const int windowHeight = 295; //this.ActualHeight;

            this.Topmost = true;
            this.ShowActivated = false;
            this.ShowInTaskbar = false;
            this.ResizeMode = ResizeMode.NoResize;
            //this.Owner = Application.Current.MainWindow;

            this.Closed += this.DailyProductivityPopUp_OnClosed;

            this.Left = SystemParameters.PrimaryScreenWidth - windowWidth;
            var top = SystemParameters.PrimaryScreenHeight - windowHeight;

            foreach (Window window in Application.Current.Windows)
            {
                var windowName = window.GetType().Name;

                if (!windowName.Equals("DailyProductivityPopUp") || window == this) continue;
                window.Topmost = true;
                top = window.Top - windowHeight;
            }

            this.Top = top;
            return base.ShowDialog();
        }