public void MockingPropertyThatReturnsStream()
{
IBaseMessagePart messagePart = MockRepository.Mock <IBaseMessagePart>();
MemoryStream stream = new MemoryStream();
messagePart.Expect(x => x.Data)
.Return(stream)
.Repeat.Any();
messagePart.Data.WriteByte(127);
stream.Seek(0, SeekOrigin.Begin);
Assert.Equal(127, stream.ReadByte());
}