using System; 
class Program 
{ 
static void Main() 
string ip = "500.234.77.90"; 
Console.WriteLine("IP address is {0}", ip); 
uint ui = IpToUInt(ip); 
Console.WriteLine("Equivalent unsigned integer is {0}", ui); 
ip = IpFromUInt(ui); 
Console.WriteLine("Converts back to IP address of {0}", ip); 
Console.ReadLine(); 
} 
public static uint IpToUInt (string ip) 
{ 
string[] temp = ip.Split('.'); 
uint[] octets = new uint[4]; 
for (int i = 0; i < 4; i++) 
{ 
octets[i] = uint.Parse(temp[i]); 
} return octets[0] + (octets[1] << 8) + (octets[2] << 16) + (octets[3] << 24); 
} public static string IpFromUInt (uint ui) 
{ uint[] octets = new uint[4]; 
octets[3] = ui >> 24; 
uint remainder = ui - (octets[3] << 24); 
octets[2] = remainder >> 16; 
remainder -= octets[2] << 16; 
octets[1] = remainder >> 8; 
remainder -= octets[1] << 8; 
octets[0] = remainder; 
string[] temp = new string[4]; 
for (int i = 0; i < 4; i++) 
{ temp[i] = octets[i].ToString(); 
} return String.Join(".", temp); 
} 

}