SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Project_Manager.Properties.Settings.Project_ManagerConnectionString"].ConnectionString);
        private void btnOK_Click(object sender, EventArgs e)
        {
            string user;
            user = txtUser.Text;
            string pass;
            pass = txtPass.Text;
            try
            {
                SqlCommand check = new SqlCommand("SELECT Username, Password FROM tblUsers WHERE Username = @user AND Password = @pass", con);
                check.Parameters.AddWithValue("@user", user);
                check.Parameters.AddWithValue("@pass", pass);
                con.Open();
                SqlDataReader reader = check.ExecuteReader();
                if (reader.HasRows)
                {
                    Form.ActiveForm.Controls["menuStrip1"].Enabled = true;
                    this.Close();
                 //   MessageBox.Show("Logged in as " + user, "Wellcome", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                else
                {
                    con.Close();
                    MessageBox.Show("Wrong username or password ", "Error Login Details", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    txtPass.Clear();
                    txtUser.Clear();
                    txtUser.Focus();
                }

            }
            catch (Exception ex)
            {
                MessageBox.Show("GREEEEEEESKAAAAAAAAAAA" + ex.ToString());
            }
            finally
            {

            }