private void Loginbtn_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection(@"Data Source=.SQLEXPRESS;Initial Catalog=MySupportHub;Integrated Security=True");
        SqlDataAdapter sda = new SqlDataAdapter(@"SELECT * FROM [dbo].[Login] Where Username='" + usernameTextBox.Text + "' and Password='" + passwordTextBox.Text + "'", con);
        DataTable dt = new DataTable();
        sda.Fill(dt);
        if (dt.Rows.Count == 1)
        {
            Settings.Default["CurrentUserName"] = usernameTextBox.Text;
            Settings.Default.Save();

            this.Hide();
            Home home = new Home();
            home.Show();
        }
        else
        {
            MessageBox.Show("Invalid Username and/or Password..!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            Clearbtn_Click(sender, e);
        }
    }

//Identify and display current logged in user

        CurrentUser.Caption = Settings.Default["CurrentUserName"].ToString();