Saradomin-Launcher/Saradomin/Utilities/CrossPlatform.cs

using System.Diagnostics;
using System.Runtime.InteropServices;

namespace Saradomin.Utilities
{
    public static class CrossPlatform
    {
        public static void LaunchURL(string url)
        {
            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
            {
                Process.Start(url);
            }
            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
            {
                Process.Start("xdg-open", url);
            }
            else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
            {
                Process.Start("open", url);
            }
        }
    }
}