private void button1_Click(object sender, EventArgs e) { var loginScreen = new Logins(); loginScreen.username = textUsername.Text; loginScreen.password = textPassword.Text; var returnVal = loginScreen.GetUsernamePass(); //it returns as dataTable if (returnVal.Rows[0][0].ToString() == "1") { this.Hide(); Dashboard dash = new Dashboard(); dash.Show(); } else { MessageBox.Show("Invalid Username or Password", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } }