GitUI.CommandsDialogs.FormBrowse.DiffContextMenu_Opening C# (CSharp) Метод

        private void DiffContextMenu_Opening(object sender, System.ComponentModel.CancelEventArgs e)
        {
            bool artificialRevSelected;

            IList<GitRevision> selectedRevisions = RevisionGrid.GetSelectedRevisions();

            if (selectedRevisions.Count == 0)
                artificialRevSelected = false;
            else
                artificialRevSelected = selectedRevisions[0].IsArtificial();
            if (selectedRevisions.Count > 1)
                artificialRevSelected = artificialRevSelected || selectedRevisions[selectedRevisions.Count - 1].IsArtificial();

            // disable items that need exactly one selected item
            bool isExcactlyOneItemSelected = DiffFiles.SelectedItems.Count() == 1;
            openWithDifftoolToolStripMenuItem.Enabled = isExcactlyOneItemSelected;
            saveAsToolStripMenuItem1.Enabled = isExcactlyOneItemSelected;
            cherryPickSelectedDiffFileToolStripMenuItem.Enabled = isExcactlyOneItemSelected;
            diffShowInFileTreeToolStripMenuItem.Enabled = isExcactlyOneItemSelected;
            fileHistoryDiffToolstripMenuItem.Enabled = isExcactlyOneItemSelected;
            blameToolStripMenuItem.Enabled = isExcactlyOneItemSelected;

            // openContainingFolderToolStripMenuItem.Enabled or not
            {
                openContainingFolderToolStripMenuItem.Enabled = false;

                foreach (var item in DiffFiles.SelectedItems)
                {
                    string filePath = FormBrowseUtil.GetFullPathFromGitItemStatus(Module, item);
                    if (FormBrowseUtil.FileOrParentDirectoryExists(filePath))
                    {
                        openContainingFolderToolStripMenuItem.Enabled = true;
                        break;
                    }
                }
            }
        }