Cancat and distinct methods descriptions and their samples added
Cancat and distinct methods descriptions and their samples added

Fermium-co/LINQ4ES2015,sickboy/LINQ4ES2015,ghorbani77/LINQ4ES2015,Fermium-co/LINQ4ES2015,sickboy/LINQ4ES2015,ghorbani77/LINQ4ES2015,sickboy/LINQ4ES2015