/// <summary> /// Checks, if a certain <paramref name="port"/> is opened on the local machine. /// </summary> /// <remarks> /// <para>Original version found at <see>http://stackoverflow.com/questions/570098/in-c-how-to-check-if-a-tcp-port-is-available/></see>.</para> /// </remarks> /// <exception cref="ArgumentException">Is thrown if the <paramref name="port"/> parameter contains a value less or equal than 0.</exception> /// <param name="port">The number of the port to check.</param> /// <returns><c>True</c> if the port is opened, otherwise <c>false.</c></returns> public static bool IsPortOpened(int port) { CheckUtil.ThrowIfZeroOrNegativ(() => port); var ipGlobalProperties = IPGlobalProperties.GetIPGlobalProperties(); var tcpConnInfoArray = ipGlobalProperties.GetActiveTcpListeners(); return(tcpConnInfoArray.Any(ep => ep.Port == port)); }