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