希望有人可以提供帮助，我刚刚将一些nuget软件包（从.net核心预览版更新为3）运行了一个构建，现在出现一条错误消息：

private LevenshteinDistance _ld = new LevenshteinDistance();
private int _filter_zip = int.Parse(ConfigHelper.GetappSettingByKey("filter_zip"));
public Factory ScoreAddresses(Factory model)
{
    Factory result = model;

    IList<Address> _compiledList = new List<Address>();
    IList<Scores> _compiledScores = new List<Scores>();

    ParallelLoopResult MailLoopResult = Parallel.ForEach(
        result.ALL_Addresses,factory =>
        {
            if (factory.MAIL_ZIP_CODE_NBR != null
                && factory.MAIL_ZIP_CODE_NBR.Length >= 1)
            {
                int _zipDistance = _ld.Compute(
                    result.Target_Address.MAIL_ZIP_CODE_NBR,factory.MAIL_ZIP_CODE_NBR);
                if (_zipDistance <= _filter_zip)
                {
                    _compiledList.Add(factory);
                    Scores _score = new Scores();
                    _compiledScores = _score.Set(_compiledScores,factory.INDIVIDUAL_ID,"Levenshtein_MAIL_ZIP_CODE_NBR",_zipDistance,string.Empty,null);
                }
            }
        });
    return result;
}

public IList<Scores> Set(IList<Scores> current,int Individual_ID,string Score_Type,int Levenshtein,string Methaphone,decimal? other)
{
    int currentcount = current.Count();
    bool updating = false;
    IList<Scores> result = current;
    try
    {
        Scores newscore = new Scores();
        //Check if scoreing for individual already present
        Scores lookingforIndv = current.AsParallel().Where(
            p => p.INDIVIDUAL_ID == Individual_ID).FirstOrDefault();

        if (lookingforIndv != null)
        {
            newscore = lookingforIndv;
            updating = true;
        }
        else
        {
            newscore.INDIVIDUAL_ID = Individual_ID;
            updating = false;
        }
        //Add score based upon indicated score type
        switch (Score_Type)
        {
            case "Levenshtein_MAIL_ZIP_CODE_NBR":
                newscore.Levenshtein_MAIL_ZIP_CODE_NBR = Levenshtein;
                result.Add(newscore);
                break;
                //More and More Cases
        }
    }
    catch (Exception e)
    {

    }
    return result;
}

从下面的图片中可以看到，我在那里找到了名字。但是我相信灰色意味着它不认为它在使用它？和即时通讯收到错误。

有关如何解决此问题的任何想法？

谢谢

here