Compare two streams bit by bit in C#

StreamEquals.cs

private bool StreamEquals(Stream a, Stream b)
{
    if (a == b)
    {
        return true;
    }
    
    if (a == null || b == null)
    {
        throw new ArgumentNullException(a == null ? "a" : "b");
    }

    if (a.Length != b.Length)
    {
        return false;
    }

    for (int i = 0; i < a.Length; i++)
    {
        int aByte = a.ReadByte();
        int bByte = b.ReadByte();
        if (aByte.CompareTo(bByte) != 0)
        {
            return false;
        }
    }

    return true;
}

StreamExtensions.cs

public static class StreamExtensions
{
    public static bool StreamEquals(this Stream self, Stream other)
    {
        if (self == other)
        {
            return true;
        }

        if (self == null || other == null)
        {
            throw new ArgumentNullException(self == null ? "self" : "other");
        }

        if (self.Length != other.Length)
        {
            return false;
        }

        for (int i = 0; i < self.Length; i++)
        {
            int aByte = self.ReadByte();
            int bByte = other.ReadByte();
            if (aByte.CompareTo(bByte) != 0)
            {
                return false;
            }
        }

        return true;
    }
}

Nice, but you forgot the case where a and b reference the same stream. In this case, you have a bug on your hands in lines 20-21...

I suggest you repalce lines 3-4 (comparing both to null) with:
if (a == b)
This way, if both are null or both reference the same stream object, you're good.

One more comment: Call it Equals. "Compare" means it should be able to tell whether one of the stream is "less than" or "greater than" the other. See int.CompareTo vs. int.Equals, for example.

Nice, but you forgot the case where a and b reference the same stream. In this case, you have a bug on your hands in lines 20-21...

I suggest you repalce lines 3-4 (comparing both to null) with:
if (a == b)
This way, if both are null or both reference the same stream object, you're good.

Thank you. You are absolutely right. Gonna change it right now.