public override void Flush()
{
try
{
if (_data != null)
{
Debug.Assert(_pos <= _data.Length);
_stream.WriteSize(_pos);
_stream.WriteByteSpan(_data.AsSpan(0, _pos));
}
else
{
_stream.RewriteSize(_pos, _startPos); // Patch previously-written dummy value.
}
}
catch (Exception ex)
{
throw new IOException("could not flush stream", ex);
}
}