public List <OperationDto> GroupOperations(Common.DTO.SecurityGroupDto group, Common.DTO.SecurityResourceDto resource)
        {
            List <OperationDto> lst = new List <OperationDto>();
            var roles = this.Repository.Context.RoleToGroups.Where(it => it.GroupId == group.SecurityGroupId).Select(it => it.Role).ToList();

            foreach (var role in roles)
            {
                var operations    = this.Repository.Context.PermissionToRoles.Where(it => it.RoleId == role.RoleId && it.Permission.ResourceId == resource.SecurityResourceId).Select(it => it.Permission.Operation);
                var operationDtos = OperationRepository.GetDtos(operations);
                lst.AddRange(operationDtos);
            }

            return(lst);
        }