C＃array.Contains函数对我来说无法正常工作

Question

我正在使用UPS记录读取文件＆amp;将它们添加到动态IList数组但不希望有任何重复记录。 所以我用.Contains检查它们但是它总是在＆＃34;中首先记录＆＃34;案件 在＆＃34;第二个日志＆＃34;如果它总是返回真实。

我正在以完全相同的方式阅读相同的文件，因此在第一次阅读后，只有重复的记录，但程序会不断添加它们。

      IList<UpsRecord> new_records = CVSReader.ParseCsvRows(settings.fileAddress);

        foreach(UpsRecord record in new_records){

            // first log
            Console.WriteLine(arrayUpsRecords.Contains<UpsRecord>(record));

            if (!arrayUpsRecords.Contains<UpsRecord>(record))
            {
                arrayUpsRecords.Add(record);

                // second log
                Console.WriteLine(arrayUpsRecords.Contains<UpsRecord>(record));

            }

        }

我正在使用FileHelpers读取文件像这样：

class CVSReader
{
    public static IList<UpsRecord> ParseCsvRows(string file_path)
    {
        FileHelperEngine FileHelper = new FileHelperEngine(typeof(UpsRecord));

        IList<UpsRecord> recordsArray = new List<UpsRecord>();

        recordsArray = FileHelper.ReadFile(file_path) as IList<UpsRecord>;

        return recordsArray;
    }
}

UpsRecord类型：

[DelimitedRecord(",")]
public class UpsRecord
{
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string service;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string tracking;
    //[FieldIgnored()]
    public string x2;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string void_indicator;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string weight;
    //[FieldIgnored()]
    public string x5;
    //[FieldIgnored()]
    public string x6;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string billto;
    //[FieldIgnored()]
    public string x8;
    //[FieldIgnored()]
    public string x9;
    //[FieldIgnored()]
    public string x10;
    //[FieldIgnored()]
    public string x11;
    //[FieldIgnored()]
    public string x12;
    //[FieldIgnored()]
    public string x13;
    //[FieldIgnored()]
    public string x14;
    //[FieldIgnored()]
    public string x15;
    //[FieldIgnored()]
    public string x16;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string attn;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string name;
    //[FieldIgnored()]
    public string x19;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string addr1;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string addr2;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string addr3;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string postcode;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string country;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string city;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string state;
    //[FieldIgnored()]
    public string x27;
    //[FieldIgnored()]
    public string x28;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string receiver_acc;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string residential;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string timestamp;
    [FieldQuoted('"', QuoteMode.OptionalForBoth)]
    public string cost;

}