public bool TestConnection()
    {
        SqlConnection conn = new SqlConnection();
        conn.ConnectionString = @"Data Source=(LocalDB)     \v11.0;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True";
        try
        {
            conn.Open();
            return (conn.State == ConnectionState.Open);
        }
        catch (SqlException ex)
        {
            return false;
        }
        finally
        {
            conn.Close();
        }
    }