this is my first build... so u can troll all you want but this is my first xD hope you enjoy! i dont know how to post pictures of my match history though.. sorry!!

First off, i like to start off with a dorans ring, because of the fact that ezreal has terrible mana early on in the game. plus i like the extra damage it gives you early game. in the beginning, most of the time go mid, but if i don't, than this will not apply for you. i try to keep distance from the champion, and try to get my last hits with the range of ezreal's auto attack, or his mystic shot. by the time i get to level 2, it should be easy to dodge everything. and you still have amazing mana re-gen so you can keep Harassing with your mystic shot. if you are having trouble holding your lane, than i may suggest getting a dorans blade for damage and survive ability.
mid game,you might need to grab blue every once and awhile so you can fire your ult down to assist team mates. and by this time, you should be able to solo dragon.
late game should be simple now that you've gotten 2 thirsters and a trinity's. most of the time the other team surrenders before i can finish my trinity's or get my phantom dancer.

i like to use these runes to increase is damage, and his dps early on for better early to mid game action. and i take armor penatration for late game purposes.

Depending on the other team, adn how you do early game. i usely get fed hard so i get 2 thirs ters and no banshees. but if you are haveing trouble surviving and junk, get a banshees.