C# LINQ到实体-如何将SQL查询（UnionAggregate）转换为LINQ

我想将其

LINQ

中的以下SQL查询转换为实体版本：

select
 geometry::UnionAggregate(geometries.GeometryBounds) 
from 
( select 
    GeometryBounds
  from 
    Province where id in ( 1, 2 )
  union all
  select 
    GeometryBounds
  from 
    Region where id in ( 1, 2 )
  union all
  select 
    GeometryBounds
  from 
    Country where id in ( 1, 2 ) 
) as geometries

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在LINQ union中，Collection.Concat（）方法提供的所有函数

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请参阅msdn:@FakeisMe我想做的是SQLGeometrics的联合聚合，而不是RAW的联合，谢谢。

var ID = new[] {1, 2};

var query = (youContext.Province
            .Select(x => x.GeometryBounds))
            .Concat
            (youContext.Region
            .Select(x => x.GeometryBounds))
            .Concat
            (youContext.Country
            .Select(x => x.GeometryBounds));