public static void Main()
object val2 = "10986423210";
object thisInvalid = "A100";
string format = "{0, -20} {1, -15}";
Console.WriteLine(format, "Object", "ToNullableULongOrDefault");
Console.WriteLine(format, "------", "-----------------------");
Console.WriteLine(format, val1, val1.ToNullableULongOrDefault());
Console.WriteLine(format, val2, val2.ToNullableULongOrDefault());
Console.WriteLine(format, "null", thisNull.ToNullableULongOrDefault());
Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableULongOrDefault());
Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableULongOrDefault(1));
Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableULongOrDefault(() => 2));