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Howto OpenBrowser

Any versions of Mono available since 2007 will support opening a url by using Process.Start with a url, for example:

Process.Start ("");

Older versions of Mono did not support this and have to manually do this. Here is how it used to be done in the past. This copes with a few different operating systems in *older* versions of Mono:

using System;
using System.Diagnostics;
public static bool OpenLink(string address) {
    try {
        int plat = (int) Environment.OSVersion.Platform;
        if ((plat != 4) && (plat != 128)) {
            // Use Microsoft's way of opening sites
        } else {
            // We're on Unix, try gnome-open (used by GNOME), then open
            // (used my MacOS), then Firefox or Konqueror browsers (our last
            // hope).
            string cmdline = String.Format("gnome-open {0} || open {0} || "+
                "firefox {0} || mozilla-firefox {0} || konqueror {0}", address);
            Process proc = Process.Start (cmdline);
            // Sleep some time to wait for the shell to return in case of error
            // If the exit code is zero or the process is still running then
            // appearently we have been successful.
            return (!proc.HasExited || proc.ExitCode == 0);
    } catch (Exception e) {
        // We don't want any surprises
        return false;

If your program is meant to be run only under GNOME, you have a better and easier solution, however. It is suficient to call Gnome.Url::Show, as shown below:

using Gnome;
public void OpenMyProgramWebsite()