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

    {

        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 double");

    var n = double.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 long, but filled with int.MaxValue (we're cheating a little bit here)");

    long n = int.MaxValue;

    checked

    {

        var y = n + 5;

        WriteLine(y);

        var x = m + 5;

        WriteLine(x);

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

    }

}

catch (OverflowException) { }

​

// these fail on the first addition:

try

{

    var n = nint.MaxValue;

    checked

    {

        var y = n + 5;

        WriteLine(y);

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

    }

}

catch (OverflowException) { }

​

try

{

    var n = nuint.MaxValue;

    checked

    {

        var y = n + 5;

        WriteLine(y);

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

    }

}

catch (OverflowException) { }

​

try

{

    var n = int.MaxValue;

    checked

    {

        var y = n + 5;

        WriteLine(y);

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

    }

}

catch (OverflowException) { }

​

// decimal fails, even though it is a floating point number

try

{

    var n = decimal.MaxValue;

    checked

    {

        var y = n + 5;

        WriteLine(y);

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

    }

}

catch (OverflowException) { }

​

// by default, C# does not check for overflow:

{

    var n = int.MaxValue;

    var y = n + 5;

    WriteLine(y);

}

​

// int.MaxValue + 1 is equal to int.MinValue

WriteLine("Is int.MaxValue + 1 == int.MinValue? " + (m + 1 == int.MinValue));

​

WriteLine("Done!");

​