Detect IP address in console/windows application in c#

StringBuilder sb = new StringBuilder();
string strHostName = Dns.GetHostName();
IPHostEntry ipEntry = Dns.GetHostByName(strHostName);
IPAddress[] addr = ipEntry.AddressList;
for (int i = 0; i < addr.Length; i++)
{
    sb.Append(addr[i].ToString());
}
string myip = sb.ToString();

StringBuilder sb = new StringBuilder();
// Get the hostname
string myHost = System.Net.Dns.GetHostName();
System.Net.IPHostEntry myIPs = System.Net.Dns.GetHostEntry(myHost);
foreach(System.Net.IPAddress myIP in myIPs.AddressList)
sb.Append(myIP.ToString());
 
string myip = sb.ToString();

 
public void getLocalIPAddress()
{
   try
   {
     string sHostName = Dns.GetHostName();
     IPHostEntry ipE = Dns.GetHostByName(sHostName);
     IPAddress[] IpA = ipE.AddressList;
     for (int i = 0; i < IpA.Length; i++)
     {
         Console.WriteLine("IP Address {0}: {1} ", i, IpA[i].ToString());
     }
   }
   catch (Exception ex)
   {
      MessageBox.Show(ex.Message.ToString(), "getLocalIPAddress");
   }
}