HostToNetworkOrder
NetworkToHostOrder

byte[] ip = BitConverter.GetBytes(ipInt);
Array.Reverse(ip);

IPAddress = new IPAddress(BitConverter.ToUInt32(ip,0))

string s = "174.36.207.186";

uint i = s.Split('.')
          .Select(uint.Parse)
          .Aggregate((a, b) => a * 256 + b);