method for getting all IP addresses

public static string GetIPAddress()
{

String strHostName = string.Empty;
strHostName = Dns.GetHostName();
IPHostEntry ipEntry = Dns.GetHostEntry(strHostName);
IPAddress[] addr = ipEntry.AddressList;
string IPAddress=string.Empty;
for (int i = 0; i < addr.Length; i++)
{
IPAddress = addr[1].ToString();
}
return IPAddress;
}