public partial class FormAddCustomer : Form
    {
        string con = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Application.StartupPath + "\\Tailoers.mdb;Persist Security Info=False";

        public FormAddCustomer()
        {
            InitializeComponent(); 
        }
        
        private void buttonsave_Click(object sender, EventArgs e)
        {
            OleDbConnection cnn = new OleDbConnection(con);
            OleDbCommand command = new OleDbCommand("Insert into Customers (CustomerName,CustomerTelephone) Values (" + textBoxname.Text + ",'" + textBoxtele.Text + "')", cnn);
            cnn.Open();
            command.CommandType = CommandType.Text;
            command.ExecuteNonQuery();
            cnn.Close();
        }
    }