System.Net.WebException was unhandled

Hey guys I really need some help I have spent hours trying to fiddle this code,

I have this:-

Code:

---

System.Net.WebClient client= new System.Net.WebClient();
 client.DownloadFile("http://localhost/test.txt", string.Concat("C:/test.txt"));

---

ok so that works fine, but I want it so that IF the file did not exist, it would have a message box poping up saying the file could not be found rather than getting a horrible message as such:-

The remote server returned an error. (404) Not Found.

I know the file doesnt' exist when I remove it from localhost, but I want to know how to verify whether or not the file exists befpre downloading, or something to give me the ability to handle custom errors!

Cheers in advance!

Code:

---

try
{
    System.Net.WebClient client= new System.Net.WebClient();
    client.DownloadFile("http://localhost/test.txt", string.Concat("C:/test.txt"));
}
catch(Exception ex)
{
    throw new Exception("Some Pretty Message for user", ex) ;
}

---

Thanks for the quick reply,

It now says syntax error 'try expected'

Is that a compile error that you are getting? Did you make sure to get the "try" at the top?

Hi again matt,

I have this:

Code:

---

try
                {
                    System.Net.WebClient client = new System.Net.WebClient();
                    client.DownloadFile("http://localhost/test.txt" string.Concat("C:/test.txt"));
                }
                catch (Exception ex)
                {
                    throw new Exception("error", ex);
                }

---

I get this error now:-
Exception was unhandled in visual c#

Just a update I managed to fix it by using the Exception Inner rather than just exception!

Cheers anyway :)