c# - entity spaces innerjoin syntax -

i have following code attempting complete query fill datalist. need join them can't find entity spaces documentation follows syntax style using, attempting change/rewrite little of code possible. please me complete query.

let table estimtes contacts field id contractors contains , want join on it, have far:

estimates resest = new estimates();           contractors cons = new contractors();          cons.query.loaddatatable();           datalist dl = (datalist)pn90day.findcontrol("dlpreapprovalestimates");            resest.query.where(resest.query.fddkey.equal(fddkey));         resest.query.innerjoin( 

estimatesquery eq = new estimatesquery("es"); contractorsquery cq = new contractorsquery("co");  eq.where(eq.fddkey == fddkey); eq.innerjoin(cq).on(eq.contractorky == cq.contractorky);  estimatescollection coll = new estimatescollection(); if(coll.load(eq)) {     // have found @ least 1 } 

i author of entityspaces