private void button1_Click(object sender, EventArgs e)
        {
            //AddBookmarkWindow bookmarkWindow = new AddBookmarkWindow();
            //bookmarkWindow.Show();

            //return;
            user = new KeyValuePair <string, string>(textBox2.Text, textBox1.Text);
            url  = ((FileExplorerWindow.UrlLocation)comboBox1.SelectedItem);
            // url = new KeyValuePair<string, string>(((UrlLocation)comboBox1.SelectedItem).BaseAddress, String.Format(((UrlLocation)comboBox1.SelectedItem).Url, textBox2.Text));

            using (HttpClient client = FileExplorerWindow.CreateHttpClient(url.BaseAddress, user))
                if (FileExplorerWindow.CheckIfExists(new FileExplorerWindow.HttpInfo(client, new FileExplorerWindow.LinkInfo(String.Format(url.Url, textBox2.Text), url, url.FolderName, "Directory", null, "Directory"), user)))
                {
                    DialogResult = DialogResult.OK;
                    this.Close();
                }
                else
                {
                    MessageBox.Show("Username and/or Password Were Incorrect.\nPlease Try Again...", "Invalid Login");
                }
        }