Display build date at Title Bar

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

private string sTitle = "Tool GUI Ver 0.1";

public Form1()
{
    InitializeComponent();

    DateTime buildDate =
    new FileInfo(Assembly.GetExecutingAssembly().Location).LastWriteTime;
    sTitle = sTitle + "  [ Built : " + buildDate + " ]";

    this.Text = sTitle;
}