/// <summary>
/// Sends data asynchronous.
/// </summary>
/// <param name="buffer">The buffer.</param>
/// <param name="offset">The offset.</param>
/// <param name="length">The length.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns></returns>
private Task SendAsync(byte[] buffer, int offset, int length, CancellationToken cancellationToken)
{
return(_tcp.WriteAsync(buffer, offset, length, cancellationToken));
}