public void Commit(int count)
{
if (count < 0)
{
ThrowHelper.ArgumentOutOfRange(nameof(count));
}
_currentSpan = _currentSpan.Slice(count);
_writtenBytesThisSpan += count;
}
static void OutOfRange(int count, int capacity)
=> ThrowHelper.ArgumentOutOfRange(nameof(count), $"Advance called with count of {count}; write capacity is {capacity}");