ReadAsciiString encoding

[USSRcoder]

Doesn't correctly (becomes ??) decode strings in cp1251 encoding.
Here my version:

internal static string ReadAsciiString(this BinaryReader br, uint length, int position = -1)
    {
        if (length == 0) return string.Empty;
        const int MAX_LENGTH = 0x40000000;
        if (length > MAX_LENGTH) throw new ArgumentOutOfRangeException(nameof(length));
        Span<byte> span = stackalloc byte[(int)length];
        br.Read(span, position);
        //unsafe
        //{
        //    return Encoding.ASCII.GetString((byte*)Unsafe.AsPointer(ref span[0]), (int)length);
        //}
        //return System.String(((byte*)Unsafe.AsPointer(ref span[0]), (int)length));
        var enc = Encoding.GetEncoding(Encoding.Default.CodePage);
        return enc.GetString(span.ToArray());
    }

This works for my system (in cp1251) and returns in UTF-8 (not ANSI 1251) - this is what we need on windows? );
for cp1251 (ANSI), just copy the binary bytes, without conversion (Like php version).

headers0.zip

[Wack0]

I'll probably need to add some way to specify ANSI encoding for cases like these. Your workaround would work for this binary if your system is set to CP1251 but not otherwise.

[USSRcoder]

yes, that's why I made Encoding.Default.CodePage. It's unlikely that anyone will look at this binary if it's not with encoding 1251 in the system.
The second option is to leave it as is, and not convert it (Not win frendly?).
You can try to determine the encoding, this is probably the best method, but it's more complicated. )