sir presently i am doing b tech in cs branch from alwar rajasthan i have good hold in c language @=as well as in c++ the best line for me java or.net iam confused plese tell me this is my 2 year in b tech

You can choose anyone. All programming basics and logics are same. They differ only in their syntax. If u choose one dont retreat. If java, then go for J2EE, structs and so on... Otherwise take .net and run behind it. Java and .net are like two roads from a single point. Take one, leave other.