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我的以下方法引发错误:

错误 205 非静态字段、方法或属性 'System.Collections.DictionaryEntry.Key.get 需要对象引用

 static string GetConfigValue(NameValueCollection tempCollection)
    {

        string paymentDisposition = string.Empty;

        Hashtable tempCollectionHash = new Hashtable();
        foreach (string key in tempCollection.Keys)
        {
            tempCollectionHash.Add(key, tempCollection[key]);
        }


        if(tempCollectionHash.ContainsKey("Cancellation"))
            paymentDisposition = (string)tempCollectionHash["Cancellation"];

        foreach (DictionaryEntry entry in tempCollectionHash)
        {
           if (DictionaryEntry.Key.Contains(" Cancellation"))
           {
               paymentDisposition = DictionaryEntry.Value.;
           }
        }

        return paymentDisposition;

    }

知道为什么它会抛出错误。

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