public ApplicationGroupStore(string connectionStringName)
        {
            _connectionString = ConfigurationManager.ConnectionStrings[connectionStringName].ConnectionString;

            _groupRepository         = new GroupRepository(_connectionString);
            _userRoleGroupRepository = new UserRoleGroupRepository(_connectionString);
        }
 public void Dispose()
 {
     if (_isDisposed)
     {
         _groupRepository         = null;
         _userRoleGroupRepository = null;
     }
 }