public string GetDbFieldName(string propertyName)
{
if (propertyName.Equals("applicationID", StringComparison.InvariantCultureIgnoreCase))
return "OrderID";
if (propertyName.Equals("tradingaccount", StringComparison.InvariantCultureIgnoreCase))
return "CustomerID";
throw new InvalidOperationException(string.Format("Property {0} not supported.", propertyName));
}