Create a program that reads from a text file one expression in Reverse Polish Notation like, for example:
3 4 6 5 - + * 6 +
(Result 21)
Each item will be stored in a queue.
Once the queue has all the items stored, you will have to store them from the queue to a stack (using class Queue and Stack provided in C#).
Finally, you will operate with the stack in order to get the correct result of the expression in RPN, and you will show it by console.