Deleting Record

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 Textbox_data_Delete_in_windows
{
    public partial class Form1 : Form
    {
        string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["dsn"];
        OleDbCommand com;
        OleDbDataAdapter oda;
        DataSet ds;
        string str;

        public Form1()
        {
            InitializeComponent();
        }

        private void btn_delete_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("Please insert data");
            }
            else
            {
               
                try
                {
                    OleDbConnection con = new OleDbConnection(ConnectionString);
                    str = "Delete  from emp where name='" + textBox1.Text + "'";
                    com = new OleDbCommand(str, con);
                    con.Open();
                    com.ExecuteNonQuery();
                    con.Close();
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
                MessageBox.Show("Would you like to delete?", "Deleting Employee Details", MessageBoxButtons.OK, MessageBoxIcon.Question);
                textBox1.Text = "";
            }
           
        }
    }
}