App_Version.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Walmart_OMS
{
    public partial class App_Version : Form
    {
        public App_Version()
        {
            InitializeComponent();
        }

        private void btn_ok_Click(object sender, EventArgs e)
        {
            this.Close();
        }


        //Drag Form

        [DllImport("user32.DLL", EntryPoint = "ReleaseCapture")]
        private extern static void ReleaseCapture();

        [DllImport("user32.DLL", EntryPoint = "SendMessage")]
        private extern static void SendMessage(System.IntPtr hWnd, int wMsg, int wParam, int lParam);



        private void panel2_MouseDown(object sender, MouseEventArgs e)
        {
            ReleaseCapture();
            SendMessage(this.Handle, 0x112, 0xf012, 0);
        }

        private void App_Version_Load(object sender, EventArgs e)
        {
            try 
            { 
                lbl_version.Text = "Version: V" + Application.ProductVersion;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }
}