GitUI.FileStatusList.FileStatusListBox_KeyDown C# (CSharp) Method

        private void FileStatusListBox_KeyDown(object sender, KeyEventArgs e)
        {
            switch (e.KeyCode)
            {
                case Keys.A:
                    {
                        if (e.Control)
                        {
                            try
                            {
                                FileStatusListBox.SuspendLayout();
                                FileStatusListBox.ClearSelected();
                                for (int n = FileStatusListBox.Items.Count - 1; n >= 0; n--)
                                {
                                    FileStatusListBox.SetSelected(n, true);
                                }
                                e.Handled = true;
                            }
                            finally
                            {
                                FileStatusListBox.ResumeLayout();
                            }
                        }
                        break;
                    }
            }
        }