using System;

using static System.Console;

var m = int.MaxValue;

// possible solutions:

try

{

    WriteLine("n is an IntPtr");

    var n = IntPtr.MaxValue;

    checked

    {

        var y = n + 5;

        WriteLine(y);

        var x = m + 5;

        WriteLine(x);

        throw new Exception("Should not get here.");

    }

}

catch (OverflowException) { }

​

try

{

    WriteLine("n is a float");

    var n = float.MaxValue;

    checked