private void metroTile1_Click(object sender, EventArgs e)
        {
            try
            {
                OleDbConnection connection = new OleDbConnection();
                connection.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\user\Desktop\Student\Database.accdb;
Persist Security Info=False;";
                connection.Open();

                OleDbCommand com1 = new OleDbCommand();
                com1.Connection = connection;
                string qu = "update [Student] set [std-name]='" + Name_txt.Text + "' ,[Phone]='" + Phone_txt.Text + "' ,[Address]='" + Address_txt.Text + "' ,[Email]='" + Email_txt.Text + "' ,[Grander]='" + Grander_txt.Text + "' ,[Birthday]='" + Birthday_txt.Text + "' ,where [ID]='" + Load_txt.Text + "'";
                com1.CommandText = qu;
                com1.ExecuteNonQuery();
                MessageBox.Show("Update Completed", "Completed", MessageBoxButtons.OK, MessageBoxIcon.None);
                connection.Close();

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), "error");
            }
        }