如何在Linq中使用join的结果

Question

我有这个SQL查询，我想在Linq中使用相同的。我对他们如何在主查询中使用组连接别名感到困惑？

SELECT '1st' AS POSITION , user as USR1, actiondate as ad1 , user2 as USR2, actiondate2 as ad2 ,user3 as USR3, actiondate3 as ad3, First as Co, * FROM APPLICATIONS A INNER  JOIN
    ( SELECT MAX(ROW) AS MAXDATE ,APPLICATIONNO FROM FIRSTM
    GROUP BY APPLICATIONNO) SULA1
    ON A.APPLICATIONNO=SULA1.APPLICATIONNO
    INNER JOIN FIRSTM FSTATUS
    ON SULA1.APPLICATIONNO=FSTATUS.APPLICATIONNO AND
    SULA1.MaxDate = FSTATUS.ROW
    INNER JOIN APPLICATIONAPPLICANTS ON A.APPLICATIONNO
     =APPLICATIONAPPLICANTS.APPLICATIONNO