public SubStream(Stream baseStream, long offset, long length)
{
ArgGuard.ThrowIfNull(baseStream, nameof(baseStream));
ArgGuard.ThrowIfFalse(baseStream.CanRead, nameof(baseStream));
ArgGuard.ThrowIfFalse(baseStream.CanSeek, nameof(baseStream));
ArgGuard.ThrowIfFalse(offset >= 0, nameof(offset));
_baseStream = baseStream;
_position = 0;
_offset = offset;
_length = length;
baseStream.Seek(offset, SeekOrigin.Current);
}
