求好手解答，

求高手解答，急~~~~

C# code

string countryDHLId = "Area" + countryInfo.DHLArea.ToString();var info = from df in db.DHLFreights  where df.WeightMax >= weight && df.WeightMin <= weight  select new  {  countryDHLId  };double dhlFreight = double.Parse(info.First().countryDHLId);

C# code

string countryDHLId = "Area" + countryInfo.DHLArea.ToString();var info = from df in db.DHLFreights  where df.WeightMax >= weight && df.WeightMin <= weight  select GetPropertyValue(df,countryDHLId);private static object GetPropertyValue(object obj, string property){    System.Reflection.PropertyInfo propertyInfo=obj.GetType().GetProperty(property);    return propertyInfo.GetValue(obj, null);}