c# - Common Table Expression in EntityFramework

Question

I have this query in Sql Server which I need to consume in EntityFramework, So how can I write a EntityFramwork code which will have the same result as this

WITH    cte AS
        (
        SELECT  *
        FROM    StockGroups
        WHERE   GroupParent ='Stationery' 
        UNION ALL
        SELECT  g.*
        FROM    StockGroups g
        JOIN    cte
        ON      g.GroupParent = cte.GroupName
        )
SELECT  *
FROM    cte

I don't know how to convert it in EF, so I tried with join.

from a in db.StockGroups
join b in db.StockGroups on new { GroupParent = a.GroupParent } equals new { GroupParent = b.GroupName }
where
  b.GroupName == "Stationery"
select new {
  a.GroupName,
  a.GroupParent,
  Column1 = b.GroupName,
  Column2 = b.GroupParent
}

But the result is not same, as recursive as CTE.

Answer 1

EF does not support recursive CTE's. Use a view or a table valued function.