Write a program that assigns the value 25 to variable x, and 5 to variable y. Output the sum, difference, product, quotient, and modulus of x and y.

What will be the output of the following method?

   static void Main(  )
   {
      int varA = 5;
      int varB = ++varA;
      int varC = varB++;
      Console.WriteLine( "A: {0}, B: {1}, C: {2}", varA, varB, varC );
   }

Write a program that demonstrates the difference between the prefix and postfix operators.