public bool IsInStore(Vehicle vehicle)
{
    bool isInStore = false;
    logger.Debug($"IsInStore invocation {vehicle.Plates.Number}");
    DbConnection connection = null;

    try
    {
        Database db = new SqlDatabase(Configuration.ConnectionString);

        SqlConnection con = new SqlConnection(Configuration.ConnectionString);
        con.Open();

        SqlCommand cmd = new SqlCommand("dbo.fn_CzyTablicaWMagazynie", con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.Add("number", SqlDbType.Char);
        cmd.Parameters["number"].Value = pojazdDane.TablicaRejestracyjna.NrTabRej;
        cmd.Parameters.Add("retVal", SqlDbType.Int);
        cmd.Parameters["retVal"].Direction = ParameterDirection.ReturnValue;

        cmd.ExecuteScalar();
        isInStore = (bool) cmd.Parameters["retVal"].Value;
    }
    catch (SqlException ex)
    {
        throw new MyException("Ther was an exception in IsInStore", ex);
    }
    finally
    {
        connection?.Dispose();
    }

    return isInStore;
}