AboutDialog.cs

using System;
using System.Diagnostics;
using System.Windows.Forms;

namespace Material_Editor
{
    public partial class AboutDialog : Form
    {
        public AboutDialog()
        {
            InitializeComponent();
        }

        private void AboutText_LinkClicked(object sender, LinkClickedEventArgs e)
        {
            try
            {
                Process.Start(new ProcessStartInfo(e.LinkText) { UseShellExecute = true });
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }
}