linq - multi left outer join query -

i'm searching linq left outer join query syntax, , i'm struggling find answer that. specific sql query is:

select tblbpgood.barcode, tblbpgood.code, name, retailprice, goodgroupid, tblbpgoodgroupl.description,    purchaseunittypeid, salesunittypeid, tblbpunittypel.description salesunittype,    tblbpunittypel_1.description purchaseunittype  tblbpgood  left outer join tblbpgoodgroupl  on tblbpgood.goodgroupid = tblbpgoodgroupl.id   left outer join tblbpunittypel  on tblbpgood.salesunittypeid = tblbpunittypel.id   left outer join tblbpunittypel tblbpunittypel_1  on tblbpgood.purchaseunittypeid = tblbpunittypel_1.id