连接2个表并在LINQ中返回多行

Question

我们有两个表.Equipment_Table和PicturesOfEquipment_Table。 我想提供设备的详细信息，以及第二张表返回设备的照片。 Equipment_Table：EqID，TitleOfEquipment，Comment PicturesOfEquipment_Table：PicID，EqID，PictureName 功能是：

public List<object> Return_Equipment(long GroupCode)
    {
        var td = from s in Entity.Equipment_Table 
                 join r in Entity.PicturesOfEquipment_Table on s.EqID equals r.EqID 
                 where s.ServiceGroupCode == GroupCode
                 select s;


        return td.ToList();
    }

但是td.ToList（）发生错误。 无法隐式转换类型＆＃39; System.Collections.Generic.List＆＃39;到＆＃39; System.Collections.Generic.List＆＃39;

Answer 1

只需：

public List<object> Return_Equipment(long GroupCode)
    {
        var td = from s in Entity.Equipment_Table 
                 join r in Entity.PicturesOfEquipment_Table on s.EqID equals r.EqID 
                 where s.ServiceGroupCode == GroupCode
                 select s;


        return td;
    }