In Visual Studio in C#, you will create a simple calculator that
performs addition, subtraction, multiplication, and division. Your
program should request a numerical input from the user, followed by
the operation to be performed, and the second number to complete
the equation. The result should be displayed to the user after each
equation is performed. For example, if the user performs 3+3, the
program should display 6 as the result.
The program should continue running so the user can...