which language is secured and better in feature

I am not answering you question and I am not even sure if there is any answer to it (for example, which is the best holiday destination, which is the best car, etc.)

First, asp.net is not a language, it is just a framework to handle http request and response. May be you want to say C#.

I will be surprise if you say any language is "secure".

If you are referring to job "security", then there is no such thing now a days. And if you ever get a secure job, what won't be because of language you know.

There is so much dynamism these days, even if you master C# today, in next two years you will need to so many new features of it that as if it is like learning new language altogether.