public void StreamUtility_AppendTo_1()
{
byte[] sourceArray = { 1, 2, 3, 4 };
MemoryStream sourceStream = new MemoryStream(sourceArray);
MemoryStream destinationStream = new MemoryStream();
StreamUtility.AppendTo(sourceStream, destinationStream, -1);
byte[] destinationArray = destinationStream.ToArray();
Assert.AreEqual(4, destinationArray.Length);
Assert.AreEqual(1, destinationArray[0]);
Assert.AreEqual(2, destinationArray[1]);
Assert.AreEqual(3, destinationArray[2]);
Assert.AreEqual(4, destinationArray[3]);
}