NUnitEqualityComparer.StreamsE­qual fails for same stream

[Charlie Poole]

Bug Reported and fixed in NUnit 2.5 series:

When asserting a stream of non-zero length is equal to itself, NUnit
returns a failure because the comparer assumes it is two separate
references that it can read in parallel.

The following test incorrectly fails with:
NUnit.Framework.AssertionException: Stream lengths are both 3. Streams
differ at offset 0.

[Test]
public void TestStreamsEqual()
{
Stream exampleStream = new MemoryStream(new byte[] {1, 2, 3});
Assert.That(exampleStream, Is.EqualTo(exampleStream));
}