Bend.MainWindow.SavePlusButtonUp C# (CSharp) Method

        private void SavePlusButtonUp(object sender, MouseButtonEventArgs e)
        {
            if (e.ChangedButton == MouseButton.Left)
            {
                if (this.currentTabIndex >= 0)
                {
                    try
                    {
                        SaveFileDialog dlg = new SaveFileDialog();
                        if (this.currentTabIndex >= 0 && this.tab[this.currentTabIndex].FullFileName != null)
                        {
                            string initialDirectory = System.IO.Path.GetDirectoryName(this.tab[this.currentTabIndex].FullFileName);
                            if (initialDirectory != null && initialDirectory.Length != 0)
                            {
                                dlg.InitialDirectory = initialDirectory;
                            }
                        }

                        FileExtensions flex = new FileExtensions();
                        dlg.Filter = flex.GetFilterString();
                        if (dlg.ShowDialog(this) ?? false)
                        {
                            this.tab[this.currentTabIndex].SaveFile(dlg.FileName);
                        }
                    }
                    catch (Exception exception)
                    {
                        StyledMessageBox.Show("ERROR", "Error Saving File" + exception.ToString());
                    }
                }
            }
            e.Handled = true;
        }