/// <summary>
/// Удаление отделения
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void удалитьToolStripMenuItem_Click(object sender, EventArgs e)
{
department.RemoveDepartment(department, TreeDepartments.SelectedNode.Name);
RefreshTreeDepartment(TreeDepartments.SelectedNode.Parent.Name);
}