List<String> fullFileName;
    List<String> fullFileName2;
 List<string> selectedScripts = new List<string>();

        public void listBox3_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (listBox3.SelectedIndex >= 0)
            {
                string fullFileName2 = selectedScripts[listBox3.SelectedIndex];
                textBox3.Text = fullFileName2;
                string File1 = fullFileName2;
                string text = System.IO.File.ReadAllText(File1);
                textEditorControl1.Text = text;
                textEditorControl1.Refresh();
            }
            else
            {

            }

        private void materialFlatButton10_Click(object sender, EventArgs e)
        {
            OpenFileDialog OpenFileDialog1 = new OpenFileDialog();
            OpenFileDialog1.Multiselect = true;
            OpenFileDialog1.Filter = "Text Files|*.txt|All Files|*.*|Lua Files|*.lua";
            OpenFileDialog1.Title = "Select a Text/Lua File";
            if (OpenFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                fullFileName2 = new List<String>(OpenFileDialog1.FileNames);


                foreach (string s in OpenFileDialog1.FileNames)
                {
                    listBox3.Items.Add(Path.GetFileName(s));
                    selectedScripts.Add(s);
                }


            }
        }



private void deleteFromListToolStripMenuItem_Click(object sender, EventArgs e)
    {
        label4.Text = " ";
        textBox3.Text = "";
        IDocument document = textEditorControl1.Document;
        document.Remove(0, document.TextLength);
        textEditorControl1.Refresh();
        selectedScripts.Clear();

        for (int i = listBox3.SelectedIndices.Count - 1; i >= 0; i--)
        {
            listBox3.Items.RemoveAt(listBox3.SelectedIndices[i]);
        }
    }