小弟刚学linq一条简单的sql语句如何转为linq

SQL code

SELECT c.SiteName,max(d.ScheduleTime),a.EnterpriseName,a.EnterpriseInfoID FROM EnterpriseInfo AS a INNER JOIN EnterpriseSite AS b ON b.EnterpriseInfoID = a.EnterpriseInfoIDINNER JOIN SiteInfo AS c ON c.SiteInfoID = b.SiteInfoID INNER JOIN ScheduleInfo AS d ON d.EnterpriseSiteID = b.EnterpriseSiteID INNER JOIN EventType AS e ON e.EventTypeID = d.EventTypeID    GROUP BY c.SiteName,a.EnterpriseName,a.EnterpriseInfoID

C# code

//代码手打，提供思路参考var query=from a in EnterpriseInfo           join b in EnterpriseSite on  a.EnterpriseInfoID equals b.EnterpriseInfoID           join c in SiteInfo  on  b.SiteInfoID  equals c.SiteInfoID           join d in ScheduleInfo on b.EnterpriseSiteID  equals d.EnterpriseSiteID           join e in EventType on d.EventTypeID equals e.EventTypeID          group new{a,b,c,d} by new {c.SiteName,a.EnterpriseName,a.EnterpriseInfoID} into g          select new{g.Key.SiteName,ScheduleTime=g.Max(d=>ScheduleTime),g.Key.EnterpriseName,g.Key.EnterpriseInfoID};