C# list 筛选FindAll

例如：参数a、list b、ModelId；根据ModelId参数进行筛选

  /// <summary>
        /// 根据ModelId筛选查询出对应的数据
        /// </summary>
        /// <param name="list"></param>
        /// <param name="ModelId"></param>
        /// <returns></returns>
        private List<GetSellerOrdersRealItemsParms> selectList(List<GetSellerOrdersRealItemsParms> list, int ModelId)
        {
            if (ModelId != )
            {
                return list.FindAll(delegate(GetSellerOrdersRealItemsParms info)
                {
                    if (info.ModelId == ModelId)
                    {
                        return true;
                    }
                    else
                    {
                        return false;
                    }
                });
            }
            else
            {
                return list.FindAll(delegate(GetSellerOrdersRealItemsParms info)
                {
                    return true;
                });
            }
        }

调用代码：

  List<GetSellerOrdersRealItemsParms> list_GetSellerOrdersRealItemsParms = new List<GetSellerOrdersRealItemsParms>();
  list_GetSellerOrdersRealItemsParms = selectList(list, request.ModelId);