/// <summary>
/// Reads the string async.
/// </summary>
/// <returns> </returns>
private async Task<string> ReadStringAsync(Task<ushort> lengthTask)
{
//read length
ushort len = await lengthTask.AutoConfigureAwait();
if(0 == len)
return string.Empty;
//read the string segment
if(!TryGetSegmentFromBuffer(len))
await ReadSegmentAsync(len).AutoConfigureAwait();
//return parsed string
return Encoding.UTF8.GetString(_lastReadSegment.Array, _lastReadSegment.Offset, _lastReadSegment.Count);
}