Cannot write to a Microsoft Access file using SQL (OLEDB) C#

I understand that this may be considered a duplicate question, but I am at an impasse and i do not know what it is I am doing wrong, I need help. The duplicate question said to use OLEDB in order to write to the Microsoft Access file, where as before I was using the SQL connection to accomplish my task. As far as i can tell there are no syntax, logic, or runtime errors and Visual Studios doesnt have an issue either.

When i run the code and go to add a new entry to the Microsoft Access Database Table, it says it worked, but when I go and look at the file there is NOTHING there. Someone please help me, I have goe through all the links, all the web pages, all the search engines, and I dont know what is wrong. I would love to learn what is wrong and how to fix it so I wont ever have to ask for help again.

Currently I am a college student and I am working on a team assignment. Our task, is to create a window that will take input from a user and then add it as a entry into an Microsoft Access File as if it were a SQL database.

The issue we are having is that we are trying to add the new entry to a local Microsoft Access file under the table named Artist. I have connected to an actual SQL server before and no one else in my group has, even worse no one has done this with using a Microsoft Access file on our PC either.

I have added the Database (Microsoft Access File) in Visual Studios using the Database Configuration Wizard. At first I was using straight SQL do to this and then i was told i need to use OLEDB in order to do this. SO I have implemented in the code and for some reason I still cannot get it to work. If anyone can give me a hand and tell me what it is I am doing wrong, I would greatly appreciate it.

Details that I believe are important for anyone to help me:

The name of the table I am attempting to write a new entry to: Artist

Name of the Microsoft Access File: Kays.accdb

Location of the Microsoft Access file: C:\KayDB\Kays.accdb (local machine)

Once again I would greatly appreciate any help that anyone can give me. I really am curious as to why the code is not working, please help me understand.

My code is as follows:

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

namespace Kay
{
public partial class Kay_Green : Form
{

    string Username,Fname, Mname, Lname, streetaddress, city, phonenumber, emailaddress, zipcode, taxIDnummber, state;

    string[,] SQLTable = new string[0, 10];

    public Kay_Green()
    {
        InitializeComponent();
    }

    private void btnSave_Click(object sender, EventArgs e)
    {//Save Button

        /*Upon clicking the save button, gather all info and save it into an temp array.
          Then send it to the SQL database.*/

        /*The order of the data in the array will be the same order in the SQL table.*/

        Fname = tbFirstName.Text;
        Mname = tbMiddleInitial.Text;
        Lname = tbLastName.Text;
        streetaddress = tbStreet.Text;
        city = tbCity.Text;
        state = cbState.Text;
        phonenumber = tbPhoneNumber.Text;
        emailaddress = tbEmailAddress.Text;
        zipcode = tbZipCode.Text;
        taxIDnummber = tbTaxID.Text;
        Username = tbUserName.Text;

        /*SQLTable[0,0] = taxIDnummber;
        SQLTable[0,1] = Fname;
        SQLTable[0,2] = Mname;
        SQLTable[0,3] = Lname;
        SQLTable[0,4] = streetaddress;
        SQLTable[0,5] = city;
        SQLTable[0,6] = state;
        SQLTable[0,7] = zipcode;
        SQLTable[0,8] = phonenumber;
        SQLTable[0,9] = emailaddress;*/



        /*Below is the details for the SQL connection*/

        string connectstring="Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\KayDB\\Kays.accdb";
        OleDbConnection connection=new OleDbConnection(connectstring);
        OleDbCommand command;
        OleDbDataAdapter adapter;
        DataTable dt = new DataTable();


        string sql ="Insert into ARTIST values ('" + taxIDnummber + "','" 
            + emailaddress + "','" + Fname + "','" + Mname + "','"
            + Lname + "','" + phonenumber+"','"+ Username + "','" 
            + streetaddress + "','" + city + "','" +state+ "','" 
            + zipcode + "')";



        try
        {

            connection.Open();

            command = new OleDbCommand(sql, connection);

            MessageBox.Show("Connection Open And data added to table! ");


            connection.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show("Can not open connection ! " + ex.StackTrace.ToString());

        }
        /*Above is the details for the SQL connection*/

    }

    private void btnCancel_Click(object sender, EventArgs e)
    {//Cancel Button
        tbCity.Clear();
        tbEmailAddress.Clear();
        tbFirstName.Clear();
        tbLastName.Clear();
        tbMiddleInitial.Clear();
        tbPhoneNumber.Clear();
        tbStreet.Clear();
        tbTaxID.Clear();
        tbZipCode.Clear();
        tbUserName.Clear();

        Close();//Go back to switchboard from here


    }

    private void btnClear_Click(object sender, EventArgs e)
    {//Clear button

        tbCity.Clear();
        tbEmailAddress.Clear();
        tbFirstName.Clear();
        tbLastName.Clear();
        tbMiddleInitial.Clear();
        tbPhoneNumber.Clear();
        tbStreet.Clear();
        tbTaxID.Clear();
        tbZipCode.Clear();
        tbUserName.Clear();
    }


}

}