Compare two streams for equality

StreamHelpers

    public static class StreamHelpers
    {
        //http://stackoverflow.com/questions/968935/c-sharp-binary-file-compare
        /// <summary>
        /// Compares two streams, returns true if equal.
        /// </summary>
        /// <param name="expectedStream"></param>
        /// <param name="actualStream"></param>
        /// <returns></returns>
        public static bool AssertEquals(this Stream expectedStream, Stream actualStream, string errorMessage)
        {
            const int bufferSize = 2048;
            byte[] buffer1 = new byte[bufferSize]; 
            byte[] buffer2 = new byte[bufferSize];
            int indexOfBuffer = 0;
            while (true)
            {
                int countExpected = expectedStream.Read(buffer1, 0, bufferSize);
                int countActual = actualStream.Read(buffer2, 0, bufferSize);

                if (countExpected == 0 && countActual ==0) // Streams ended
                    return true;

                // You might replace the following with an efficient "memcmp"
                if (!buffer1.SequenceEqual(buffer2))
                {
                    Console.WriteLine("Mismatch in {0}th buffer of {1} bytes.",
                        indexOfBuffer, bufferSize);
                    return false;
                }
                indexOfBuffer++;
            }
        }
    }