Handle network exceptions

using System;
using System.Net;
using System.IO;

class MainClass {
public static void Main() {
int ch;

try {

HttpWebRequest req = (HttpWebRequest) WebRequest.Create("http://www.buthlan.name");

HttpWebResponse resp = (HttpWebResponse) req.GetResponse();

Stream istrm = resp.GetResponseStream();

for(int i=1; ; i++) {
ch = istrm.ReadByte();
if(ch == -1)
break;
Console.Write((char) ch);
}

resp.Close();

} catch(WebException exc) {
Console.WriteLine("Network Error: " + exc.Message +
"\nStatus code: " + exc.Status);
} catch(ProtocolViolationException exc) {
Console.WriteLine("Protocol Error: " + exc.Message);
} catch(UriFormatException exc) {
Console.WriteLine("URI Format Error: " + exc.Message);
} catch(NotSupportedException exc) {
Console.WriteLine("Unknown Protocol: " + exc.Message);
} catch(IOException exc) {
Console.WriteLine("I/O Error: " + exc.Message);
} catch(System.Security.SecurityException exc) {
Console.WriteLine("Security Exception: " + exc.Message);
} catch(InvalidOperationException exc) {
Console.WriteLine("Invalid Operation: " + exc.Message);
}
}
}