java vs c#

sir i wanna ak u today we r seeing war b/w two tech: sir tell me wat to do java or c# sir i am doing java and i think i have done and in my area many peaples are certified well java's certification is expensive and in web sites i usuallu see the microsfot product i never seen the java product there will tell me wat to do i should i gon in c# pro: side or remain in java
sir one more qusetion i am little bit weak programming tell me wat to do .... well i know how to play with java i feel deficulty when some ask me to write program for it.