private static void ExtractFileWith7Z(string sourceArchive, string destination)
        {
            string zPath = "7z.exe"; //add to proj and set CopyToOuputDir
           
            try
            {

                ProcessStartInfo pro = new ProcessStartInfo();
                pro.WindowStyle = ProcessWindowStyle.Hidden;
                pro.UseShellExecute = false;
                pro.RedirectStandardOutput = true;
                pro.FileName = zPath;
                pro.Arguments = string.Format("x \"{0}\" -y -o\"{1}\"", sourceArchive, destination);             
                Process x = Process.Start(pro);
             
               // string output = x.StandardOutput.ReadToEnd();
                
             x.WaitForExit();
                

            }
            catch (System.Exception Ex)
            {
                throw Ex;
            }
        }

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


namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

            DataTable dt = new DataTable();
            OleDbConnection oConexion = new OleDbConnection() ;
            OleDbCommand ocom=new OleDbCommand();
         //   OleDbCommandBuilder cBuilder = new OleDbCommandBuilder(r)

            oConexion.ConnectionString = WindowsFormsApplication1.Properties.Settings.Default.conexionBBDD;

            oConexion.Open();

            ocom.Connection = oConexion;

            ocom.CommandText = ("SELECT * FROM Contactos");
          
            OleDbDataAdapter oadapter = new OleDbDataAdapter(ocom);

           
            dataGridView1.DataSource = dt;
            oadapter.Fill(dt);

            

            oConexion.Close();
        }