int result = Nullable.Compare<int>(a, b) / Equals

두개의 Nullable 객체를 비교하거나 (Compare(), Equals() 메서드)

void NullableTest()
{
    int? a = null;
    int? b = 0;            
    int result = Nullable.Compare<int>(a, b);
    Console.WriteLine(result); //결과 -1

    double? c = 0.01;
    double? d = 0.0100;
    bool result2 = Nullable.Equals<double>(c, d);
    Console.WriteLine(result2); //결과 true
}