public void Calculate_CreatesTheChecksum()
{
byte[] data = Encoding.UTF8.GetBytes("some text");
MemoryStream stream = new MemoryStream();
stream.Write(data, 0, data.Length);
stream.Position = 0;
string checksum = Checksum.Calculate(stream);
Assert.That(checksum, Is.EqualTo("B94F6F125C79E3A5FFAA826F584C10D52ADA669E6762051B826B55776D05AED2"));
}