NEW ONE IN C #..HELP

hi all programmers here i am new in c# programming

i tiung i am a a bit good in c /c++ and i hear about c#

i see that it is too goo too powerful

so I need to know where from i should start

in other mean

what i must know be4 i read in it

and if any one know about goods free book pls send

thanks alot for all the ones that will replay for me :)