Add Stream.CreateWaitHandle non-null check
Add Stream.CreateWaitHandle non-null check

ptoonen/corefx,ViktorHofer/corefx,cydhaselton/corefx,elijah6/corefx,weltkante/corefx,the-dwyer/corefx,yizhang82/corefx,the-dwyer/corefx,stephenmichaelf/corefx,YoupHulsebos/corefx,twsouthwick/corefx,yizhang82/corefx,rahku/corefx,parjong/corefx,shimingsg/corefx,richlander/corefx,jlin177/corefx,rubo/corefx,Petermarcu/corefx,MaggieTsang/corefx,nbarbettini/corefx,Petermarcu/corefx,rjxby/corefx,tijoytom/corefx,cydhaselton/corefx,DnlHarvey/corefx,lggomez/corefx,axelheer/corefx,elijah6/corefx,nbarbettini/corefx,parjong/corefx,ptoonen/corefx,cydhaselton/corefx,krk/corefx,BrennanConroy/corefx,ViktorHofer/corefx,rahku/corefx,krytarowski/corefx,stone-li/corefx,stephenmichaelf/corefx,seanshpark/corefx,nchikanov/corefx,Petermarcu/corefx,ravimeda/corefx,marksmeltzer/corefx,JosephTremoulet/corefx,tijoytom/corefx,mmitche/corefx,alexperovich/corefx,mazong1123/corefx,rahku/corefx,ravimeda/corefx,billwert/corefx,parjong/corefx,Ermiar/corefx,axelheer/corefx,seanshpark/corefx,YoupHulsebos/corefx,DnlHarvey/corefx,rjxby/corefx,tijoytom/corefx,dhoehna/corefx,YoupHulsebos/corefx,mazong1123/corefx,krytarowski/corefx,yizhang82/corefx,rjxby/corefx,dhoehna/corefx,stone-li/corefx,zhenlan/corefx,mazong1123/corefx,richlander/corefx,fgreinacher/corefx,ViktorHofer/corefx,wtgodbe/corefx,lggomez/corefx,lggomez/corefx,lggomez/corefx,Petermarcu/corefx,JosephTremoulet/corefx,mazong1123/corefx,Ermiar/corefx,weltkante/corefx,cydhaselton/corefx,Jiayili1/corefx,Jiayili1/corefx,krk/corefx,rubo/corefx,tijoytom/corefx,BrennanConroy/corefx,stone-li/corefx,dhoehna/corefx,stephenmichaelf/corefx,seanshpark/corefx,nchikanov/corefx,seanshpark/corefx,twsouthwick/corefx,mmitche/corefx,wtgodbe/corefx,MaggieTsang/corefx,alexperovich/corefx,mmitche/corefx,marksmeltzer/corefx,alexperovich/corefx,rjxby/corefx,krytarowski/corefx,DnlHarvey/corefx,rjxby/corefx,alexperovich/corefx,krk/corefx,Ermiar/corefx,weltkante/corefx,rjxby/corefx,nchikanov/corefx,DnlHarvey/corefx,mmitche/corefx,MaggieTsang/corefx,Petermarcu/corefx,shimingsg/corefx,wtgodbe/corefx,billwert/corefx,yizhang82/corefx,richlander/corefx,tijoytom/corefx,alexperovich/corefx,nbarbettini/corefx,stone-li/corefx,gkhanna79/corefx,parjong/corefx,ravimeda/corefx,krk/corefx,MaggieTsang/corefx,dhoehna/corefx,yizhang82/corefx,seanshpark/corefx,twsouthwick/corefx,rjxby/corefx,dotnet-bot/corefx,stone-li/corefx,tijoytom/corefx,mmitche/corefx,ericstj/corefx,BrennanConroy/corefx,wtgodbe/corefx,marksmeltzer/corefx,dhoehna/corefx,parjong/corefx,rubo/corefx,gkhanna79/corefx,axelheer/corefx,krytarowski/corefx,YoupHulsebos/corefx,rubo/corefx,lggomez/corefx,jlin177/corefx,wtgodbe/corefx,fgreinacher/corefx,zhenlan/corefx,krk/corefx,dotnet-bot/corefx,shimingsg/corefx,the-dwyer/corefx,shimingsg/corefx,rubo/corefx,stephenmichaelf/corefx,ericstj/corefx,nchikanov/corefx,ericstj/corefx,parjong/corefx,gkhanna79/corefx,ravimeda/corefx,ViktorHofer/corefx,zhenlan/corefx,gkhanna79/corefx,gkhanna79/corefx,YoupHulsebos/corefx,billwert/corefx,lggomez/corefx,MaggieTsang/corefx,richlander/corefx,dotnet-bot/corefx,elijah6/corefx,marksmeltzer/corefx,Ermiar/corefx,ptoonen/corefx,dotnet-bot/corefx,ericstj/corefx,axelheer/corefx,dotnet-bot/corefx,YoupHulsebos/corefx,Jiayili1/corefx,MaggieTsang/corefx,krk/corefx,DnlHarvey/corefx,billwert/corefx,ravimeda/corefx,alexperovich/corefx,shimingsg/corefx,Ermiar/corefx,marksmeltzer/corefx,fgreinacher/corefx,cydhaselton/corefx,stephenmichaelf/corefx,cydhaselton/corefx,dotnet-bot/corefx,krytarowski/corefx,elijah6/corefx,shimingsg/corefx,tijoytom/corefx,weltkante/corefx,stone-li/corefx,richlander/corefx,JosephTremoulet/corefx,Jiayili1/corefx,MaggieTsang/corefx,weltkante/corefx,seanshpark/corefx,ViktorHofer/corefx,stephenmichaelf/corefx,DnlHarvey/corefx,nbarbettini/corefx,billwert/corefx,YoupHulsebos/corefx,rahku/corefx,alexperovich/corefx,mazong1123/corefx,mmitche/corefx,gkhanna79/corefx,parjong/corefx,ViktorHofer/corefx,billwert/corefx,DnlHarvey/corefx,the-dwyer/corefx,zhenlan/corefx,fgreinacher/corefx,mazong1123/corefx,marksmeltzer/corefx,marksmeltzer/corefx,rahku/corefx,lggomez/corefx,Jiayili1/corefx,jlin177/corefx,the-dwyer/corefx,krytarowski/corefx,Ermiar/corefx,the-dwyer/corefx,mmitche/corefx,jlin177/corefx,wtgodbe/corefx,ravimeda/corefx,nchikanov/corefx,seanshpark/corefx,richlander/corefx,gkhanna79/corefx,dhoehna/corefx,Petermarcu/corefx,nbarbettini/corefx,yizhang82/corefx,weltkante/corefx,JosephTremoulet/corefx,Jiayili1/corefx,jlin177/corefx,richlander/corefx,rahku/corefx,ptoonen/corefx,twsouthwick/corefx,axelheer/corefx,nbarbettini/corefx,zhenlan/corefx,billwert/corefx,elijah6/corefx,shimingsg/corefx,elijah6/corefx,nchikanov/corefx,dotnet-bot/corefx,JosephTremoulet/corefx,rahku/corefx,nbarbettini/corefx,stone-li/corefx,elijah6/corefx,mazong1123/corefx,jlin177/corefx,twsouthwick/corefx,twsouthwick/corefx,ravimeda/corefx,JosephTremoulet/corefx,wtgodbe/corefx,Ermiar/corefx,Petermarcu/corefx,krytarowski/corefx,ericstj/corefx,ptoonen/corefx,yizhang82/corefx,ericstj/corefx,dhoehna/corefx,ericstj/corefx,JosephTremoulet/corefx,nchikanov/corefx,ptoonen/corefx,zhenlan/corefx,krk/corefx,the-dwyer/corefx,axelheer/corefx,ptoonen/corefx,Jiayili1/corefx,cydhaselton/corefx,ViktorHofer/corefx,zhenlan/corefx,jlin177/corefx,twsouthwick/corefx,weltkante/corefx,stephenmichaelf/corefx