C# 如何在Fluent LINQ中连接or子句

我正试图把两张桌子连接起来

TSQL将是：

SELECT * 
FROM User u INNER JOIN Hierarchy h ON u.OrganisationId = h.OrganisationId 
   OR u.OrganisationId = h.OwnerOrganisationId

我已经搜索过了，没有人能用流利的语言回答这个问题。我能想到的最接近的是：

var join1 = context.User.Join(context.Hierarchy, u => u.OrganisationId, h => h.OrganisationId, uh => new {u, h});
var join2 = context.User.Join(context.Hierarchy, u => u.OrganisationId, h => h.OwnerOrganisationId, uh => new {u, h});
var desiredResult = join1.Union(join2);

---

但这似乎效率很低。

语法流畅

var orJoin = context.User.SelectMany(
                u => context.Hierarchy.Where(h => u.OrganisationId == h.OrganisationId || u.OrganisationId == h.OwnerOrganisationId),
                (u, h) => new { u, h }
             );

var orJoin = from u in context.User
             from h in context.Hierarchy
             where u.OrganisationId == h.OrganisationId || u.OrganisationId == h.OwnerOrganisationId
             select new { u, h };

---

查询语法

var orJoin = context.User.SelectMany(
                u => context.Hierarchy.Where(h => u.OrganisationId == h.OrganisationId || u.OrganisationId == h.OwnerOrganisationId),
                (u, h) => new { u, h }
             );

var orJoin = from u in context.User
             from h in context.Hierarchy
             where u.OrganisationId == h.OrganisationId || u.OrganisationId == h.OwnerOrganisationId
             select new { u, h };

---

您看过优化的执行计划了吗？我想知道where子句中交叉连接和筛选的执行计划是什么样子的。谢谢，很抱歉回复太晚。这不是一个直接的解决方案，但帮助我自己解决了具体问题。