public MessageBox(string Message, string Title,
                   MessageBox.MessageBoxButtons MessageBoxButtons = MessageBox.MessageBoxButtons.OK,
                   MessageBoxIcon MessageBoxIcon = MessageBoxIcon.Error) // !!!! TODO check if default really is Error !!!!
 {
     Page.Title      = Title;
     lblMessage.Text = Message;
 }
        public void Show(string Message, string Title,
                         MessageBox.MessageBoxButtons MessageBoxButtons = MessageBox.MessageBoxButtons.OK,
                         MessageBoxIcon MessageBoxIcon = MessageBoxIcon.Error) // !!!! TODO check if default really is Error !!!!
        {
            string querystring = $"?Message={System.Web.HttpUtility.UrlEncode(Message)}&Title={System.Web.HttpUtility.UrlEncode(Title)}" +
                                 $"MessageBoxButtons={((int)MessageBoxButtons).ToString()}&MessageBoxIcon={((int)MessageBoxIcon).ToString()}";

            Page.Title      = Title;
            lblMessage.Text = Message;

            //Server.Transfer("MessageBox.aspx" + querystring);
            //Response.Redirect("MessageBox.aspx" + querystring);
        }