Implementation without yield
Implementation without yield

Picked up the Enumerator implementation without yield and addressed code
review comments by removing the lambdas and using foreach instead.

adamsitnik/corefxlab,hanblee/corefxlab,joshfree/corefxlab,ericstj/corefxlab,whoisj/corefxlab,livarcocc/corefxlab,VSadov/corefxlab,hanblee/corefxlab,whoisj/corefxlab,ahsonkhan/corefxlab,stephentoub/corefxlab,ericstj/corefxlab,VSadov/corefxlab,benaadams/corefxlab,Vedin/corefxlab,stephentoub/corefxlab,VSadov/corefxlab,stephentoub/corefxlab,alexperovich/corefxlab,Vedin/corefxlab,tarekgh/corefxlab,ericstj/corefxlab,VSadov/corefxlab,Vedin/corefxlab,stephentoub/corefxlab,weshaggard/corefxlab,VSadov/corefxlab,dotnet/corefxlab,ravimeda/corefxlab,KrzysztofCwalina/corefxlab,nguerrera/corefxlab,ericstj/corefxlab,Vedin/corefxlab,dotnet/corefxlab,KrzysztofCwalina/corefxlab,ericstj/corefxlab,ahsonkhan/corefxlab,Vedin/corefxlab,adamsitnik/corefxlab,benaadams/corefxlab,Vedin/corefxlab,stephentoub/corefxlab,joshfree/corefxlab,ericstj/corefxlab,tarekgh/corefxlab,VSadov/corefxlab,stephentoub/corefxlab