这是神马情况？ObjectParameter传入参数不对了

代码1

 

 

 String esql = @"select Value it from DataMartEntities.Companies as it ";

                    ObjectQuery<Company> query = entities.CreateQuery<Company>(esql);
                   
                    query = query.Where("it.Company_Name_CN like '%@name%'");
                    query.Parameters.Add(new ObjectParameter("name", "XXX公司");
  
                    
                    return query.ToList<Company>();

 

 

代码2

 String esql = @"select Value it from DataMartEntities.Companies as it ";

                    ObjectQuery<Company> query = entities.CreateQuery<Company>(esql);
           
                    query = query.Where("it.Company_Name_CN like '%"+"XXX公司"+"%'");
   
                    return query.ToList<Company>();

 

代码2跟代码1照理应该没区别才对，为什么代码1不能返回记录，代码2可以呢？

还是说参数字符有什么限制？ 求解