Reachability .cs

using MonoTouch.SystemConfiguration;
using System.Threading.Tasks;

namespace GoogleAnalytics
{
    public static class Reachability 
    {
        public static bool IsReachableWithoutRequiringConnection(NetworkReachabilityFlags flags)
        {
            // Is it reachable with the current network configuration?
            bool isReachable = (flags & NetworkReachabilityFlags.Reachable) != 0;

            // Do we need a connection to reach it?
            bool noConnectionRequired = (flags & NetworkReachabilityFlags.ConnectionRequired) == 0;

            // Since the network stack will automatically try to get the WAN up, probe that
            if ((flags & NetworkReachabilityFlags.IsWWAN) != 0)
                noConnectionRequired = true;

            return isReachable && noConnectionRequired;
        }

        // Is the host reachable with the current network configuration
        public static bool IsHostReachable(string host)
        {
            if (string.IsNullOrEmpty(host))
                return false;

            using (var r = new NetworkReachability(host))
            {
                NetworkReachabilityFlags flags;

                if (r.TryGetFlags(out flags))
                {
                    return IsReachableWithoutRequiringConnection(flags);
                }
            }
            return false;
        }
 
        public static Task<bool> IsHostReachableAsync(string host)
        {
            var tcs = new TaskCompletionSource<bool>();

            Task.Run(() =>
            {
                tcs.SetResult(IsHostReachable(host));
            });

            return tcs.Task;
        }
    }
}