private static void CheckDouble(double expectedValue, int expectedSize)
{
IFieldWriter writer = new FieldWriter();
writer.Write(expectedValue);
IFieldReader reader = new FieldReader(writer.ToArray());
double actualValue = reader.ReadDouble();
Assert.AreEqual(expectedValue, actualValue, "Expected deserialized value ");
Assert.AreEqual(expectedSize, writer.Position, "Unexpected size for {0} ", expectedValue);
}