实体框架相当于`geometry :: UnionAggregate`（SQL Server 2012）

Question

是否存在与此查询等效的实体框架，mentioned here？

SELECT geometry::UnionAggregate(geomcolumn) FROM YourTable;

在GROUP BY中使用它之后的目标，例如......

SELECT geometry::UnionAggregate(geomcolumn)
FROM YourTable
GROUP BY textcolumn;