NullValues

using System;

class NullValues
{
    static void Main()
    {
        int? integer = null;
        Console.WriteLine(integer.GetValueOrDefault() + 5);// (GetValueOrDefault() + 5) = 5

        Console.WriteLine(integer + 5);// null + 5 = null !

        float? floatInPoint = null;
        Console.WriteLine(floatInPoint.GetValueOrDefault()); // GetValueOrDefault() without literal

        integer = 5;
        floatInPoint = 10;

        Console.WriteLine(" Integer {0}, Float {1}",integer.GetValueOrDefault(),floatInPoint.GetValueOrDefault());
    }
}