How to read connection string from sql table using C#.net

I am using .net window form application using Ms-access database, In aceess database i have a table which define connection string attribute then how to fetch sql connection string from access database and make a new connection to get sql database table.

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 Mapping

{

public partial class Form1 : Form

{

private OleDbConnection Conn;

private OleDbCommand oleDbCmd = new OleDbCommand();

//parameter from mdsaputra.udl

private String connParam = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\\noisuf.dtl;Persist Security Info=False";

public Form1()

{

Conn = new OleDbConnection(connParam);

InitializeComponent();

//connection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\noisuf.dtl;Persist Security Info=False");

}

private void button1_Click(object sender, EventArgs e)

{

Conn.Open();

oleDbCmd.Connection = Conn;

OleDbDataAdapter dAdapter = new OleDbDataAdapter("Select ConStringname from MappingConnections", connParam);

OleDbCommandBuilder cBuilder = new OleDbCommandBuilder(dAdapter);

DataTable dataTable = new DataTable();

DataSet ds = new DataSet();

dAdapter.Fill(dataTable);

Conn.Close();

//string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\\noisuf.dtl;Persist Security Info=False";

//string query = "Select ConStringName from MappingConnections";

//OleDbConnection conn = new OleDbConnection(connString);

//OleDbCommand cmd = new OleDbCommand(query, conn);

//conn.Open();

//// create data adapter

//OleDbDataAdapter da = new OleDbDataAdapter(cmd);

//// this will query your database and return the result to your datatable

//da.Fill(dataTable);

//conn.Close();

//da.Dispose();

}