public void AddPrivateKey ()
        {
            AddPrivateKeyWindowController cwc = new AddPrivateKeyWindowController ();
            NSApplication.SharedApplication.BeginSheet (cwc.Window, VMCertStoreSnapInEnvironment.Instance.mainWindow, () => {
            });
            nint result = NSApplication.SharedApplication.RunModalForWindow (cwc.Window);
            try {
                if (result == (nint)VMIdentityConstants.DIALOGOK) {
                    var dto = cwc.PrivateKeyDTO;
                    string storeName = (string)Tag;
                    string storePass = "";
                    using (var session = new VecsStoreSession (ServerNode.ServerDTO.VecsClient, storeName, storePass)) {
                        session.AddPrivateKeyEntry (dto.Alias, dto.PrivateKey, dto.Password, dto.Certificate);
                    }
                    UIErrorHelper.ShowAlert ("Private Entity Added", "Info");

                    ServerNode.UpdateStoreInfo (storeName);
                    NSNotificationCenter.DefaultCenter.PostNotificationName ("ReloadTableView", this);

                }
            } catch (Exception e) {
                UIErrorHelper.ShowAlert (e.Message, "Alert");
            } finally {
                VMCertStoreSnapInEnvironment.Instance.mainWindow.EndSheet (cwc.Window);
                cwc.Dispose ();
            }
        }