Can any one explain static and dynamic memory allocation and stack , heap in c#

These are the basics of programming. If someone needs explanation on those basics, presently not having clear understanding of them, it means that this person needs to read a whole book and do some exercises to make sure all the concepts are understood correctly. I think you understand that writing such a book specially on your request would be not realistic.

You need to learn it all by available literature (and do the exercises) and ask more specific questions if you have some concerns.

And the expression "real time" here is absurd. None of the OS where you can program in C# are not real-time. You just misuse the term.

—SA