A simple Calculator

// Storage
int value1 = 0;
int value2 = 0;
int total = 0;
string operation;

// Get first number
value1 = GetNumber();

// Get Operation
Console.Write("What operation would you like to perform: ");
operation = Console.ReadLine();

// Get second number
value2 = GetNumber();

// Perform the operation
if (operation == "+")
total = value1 + value2; // Addition
else if (operation == "-")
total = value1 - value2; // Subtraction
else if (operation == "/")
total = value1 / value2; // Division
else if (operation == "*")
total = value1 * value2; // Multiplication
else
{
// Ignore other keypresses
}

// Output the answer
Console.WriteLine("The total is {0}", total);