using System;

public class Program

{

    public static void Main()

    {

        var rand = new Random();

        int test = 0;

        //obscured enough that the compiler doesn't "know" that the line will produce an overflow

        //Does not run explicitly as checked, so no runtime OverflowException is thrown

        test = rand.Next(Int32.MaxValue-2, Int32.MaxValue) + 10;

        //simple enough that the compiler "knows" that the line will produce an overflow

        //Compilation error (line 16, col 10): The operation overflows at compile time in checked mode

        //test = Int32.MaxValue + 1;

        //Explicitly running as unchecked. Compiler allows line that is "known" to overflow.

        unchecked

        {

            test = Int32.MaxValue + 1;

        }

        Console.WriteLine(test);

        //Explicitly running as unchecked. Still no runtime OverflowException

        unchecked

        {

            test = test - 10;   

        }

        Console.WriteLine(test);

        //Explicitly running as checked. System.OverflowException: Arithmetic operation resulted in an overflow.

        checked

        {

            test = test + 10;

        }

        Console.WriteLine(test);

    }

}