{"id":90610,"date":"2026-08-05T16:48:38","date_gmt":"2026-08-05T08:48:38","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/90610.html"},"modified":"2026-08-05T16:48:38","modified_gmt":"2026-08-05T08:48:38","slug":"8%e6%9c%885%e6%97%a5%e5%ad%a6%e4%b9%a0%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/90610.html","title":{"rendered":"8\u67085\u65e5\u5b66\u4e60\u7b14\u8bb0"},"content":{"rendered":"

list<><\/h3>\n

\u5e38\u89c1\u65b9\u6cd5\u4f7f\u7528<\/h4>\n
  • \n

    numbers.Remove<\/p>\n<\/li>\n

  • \n

    numbers.RemoveAt(0)\u5220\u9664\u7d22\u5f15\u4e3a0\u7684\u5143\u7d20<\/p>\n<\/li>\n

  • \n

    numbers.RemoveAll(x>10)\u5220\u9664\u6240\u6709\u5927\u4e8e10<\/p>\n<\/li>\n

  • \n

    numbers.RemoveRange(1,2)\u4ece\u7d22\u5f151\u5f00\u59cb\u5220\u9664\u4e24\u4e2a\u5143\u7d20<\/p>\n<\/li>\n

  • \n

    numbers.Clear<\/p>\n<\/li>\n

  • \n

    bool ex = numbers.Countains(20)\u68c0\u67e5\u662f\u5426\u5305\u542b\u5143\u7d2020<\/p>\n<\/li>\n

  • \n

    int index = numbers.IndexOf(20)\u8fd4\u56de\u7b2c\u4e00\u4e2a\u5339\u914d\u5143\u7d20\u7684\u7d22\u5f15 \u672a\u627e\u5230\u8fd4\u56de-1<\/p>\n<\/li>\n

  • \n

    int fount = numbers.Find()<\/p>\n<\/li>\n

    Linq\u8bed\u53e5\u7b80\u5355\u4e86\u89e3<\/h3>\n

    eg:\u5728\u6570\u7ec4\u4e2d\u5b58\u51655\u4e2a\u6570\u636e，\u628a\u6ee1\u8db3\u6761\u4ef6\u7684\u6253\u5370\u51fa\u6765<\/p>\n

    List<People> _list = new List<People>();
    \nRandom r = new Random();
    \nfor (int i = 0; i < 5; i++)
    \n{
    \n \u00a0 \u00a0People p = new People();
    \n \u00a0 \u00a0p= r.Next(50);
    \n \u00a0 \u00a0_list.Add(p);
    \n}
    \nvar q = from pp in _list3
    \n \u00a0 \u00a0 \u00a0 \u00a0where pp.age > 18
    \n \u00a0 \u00a0 \u00a0 \u00a0select pp.age;\/\/\u628a\u6ee1\u8db3\u6761\u4ef6\u7684\u88c5\u5230q\u4e2d
    \nforeach (var qq in q)
    \n{
    \n \u00a0 \u00a0Console.WriteLine(qq);
    \n}<\/p>\n

    \u5b57\u5178Dictonary<\/h3>\n

    1. \u57fa\u7840\u6982\u5ff5\u4e0e\u58f0\u660e<\/h4>\n
      \n
    • \n

      \u5b9a\u4e49：Dictionary<\/p>\n<\/li>\n

    • \n

      \u7279\u70b9：<\/p>\n

        \n
      • \n

        \u952e（Key）\u5fc5\u987b\u552f\u4e00，\u4e0d\u80fd\u91cd\u590d\u3002<\/p>\n<\/li>\n

      • \n

        \u952e\u4e0d\u80fd\u4e3a null（\u503c\u7c7b\u578b\u9664\u5916，\u5f15\u7528\u7c7b\u578b\u952e\u53ef\u4e3a null，\u4f46\u9700\u6ce8\u610f\u54c8\u5e0c\u51b2\u7a81）\u3002<\/p>\n<\/li>\n

      • \n

        \u503c（Value）\u53ef\u4ee5\u4e3a null（\u5f15\u7528\u7c7b\u578b）\u3002<\/p>\n<\/li>\n

      • \n

        \u65e0\u5e8f（\u5143\u7d20\u987a\u5e8f\u4e0d\u4fdd\u8bc1，\u6309\u54c8\u5e0c\u6392\u5217）\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

      • \n

        \u4e3e\u4f8b\u8bf4\u660e<\/p>\n<\/li>\n<\/ul>\n

        Dictionary<int,string> _dic = new Dictionary<int,string>();
        \n\/\/\u6b64\u5904\u7684name\u4ee3\u8868\u7684\u5c31\u662f\u5f20\u4e09\u8fd9\u6761\u6570\u636e\u5728\u96c6\u5408\u4e2d\u7684\u952e\u540d，\u5bf9\u5f20\u4e09\u7684\u64cd\u4f5c\u90fd\u8981\u4ee5name\u4e3a\u57fa\u51c6
        \n_dic.Add(1, "\u5f20\u4e09");
        \n\/\/\u83b7\u53d6\u5bf9\u5e94\u7684\u503c
        \nConsole.WriteLine(_dic[1]);\/\/\u53d6\u503c<\/p>\n

        2. \u5e38\u7528\u589e\u5220\u6539\u67e5\u64cd\u4f5c<\/h4>\n\n\u64cd\u4f5c\u65b9\u6cd5 \/ \u8bed\u6cd5\u8bf4\u660e<\/tr>\n\n\n\n\n\n\n\n\n\n\n
        \u6dfb\u52a0<\/td>\nAdd(key, value)<\/td>\n\u952e\u91cd\u590d\u4f1a\u629b ArgumentException<\/td>\n<\/tr>\n
        \u6dfb\u52a0\u6216\u66f4\u65b0<\/td>\ndict[key] = value<\/td>\n\u952e\u4e0d\u5b58\u5728\u5219\u6dfb\u52a0，\u5b58\u5728\u5219\u8986\u76d6<\/td>\n<\/tr>\n
        \u53d6\u503c<\/td>\ndict[key]<\/td>\n\u952e\u4e0d\u5b58\u5728\u629b KeyNotFoundException<\/td>\n<\/tr>\n
        \u5b89\u5168\u53d6\u503c<\/td>\nTryGetValue(key, out var val)<\/td>\n\u63a8\u8350，\u907f\u514d\u5f02\u5e38，\u8fd4\u56de bool<\/td>\n<\/tr>\n
        \u5224\u65ad\u952e\u5b58\u5728<\/td>\nContainsKey(key)<\/td>\n\u8fd4\u56de bool<\/td>\n<\/tr>\n
        \u5224\u65ad\u503c\u5b58\u5728<\/td>\nContainsValue(value)<\/td>\nO(n) \u904d\u5386，\u8c28\u614e\u4f7f\u7528<\/td>\n<\/tr>\n
        \u5220\u9664<\/td>\nRemove(key)<\/td>\n\u8fd4\u56de bool \u8868\u793a\u662f\u5426\u5220\u9664\u6210\u529f<\/td>\n<\/tr>\n
        \u6e05\u7a7a<\/td>\nClear()<\/td>\n<\/td>\n<\/tr>\n
        \u6570\u91cf<\/td>\nCount \u5c5e\u6027<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        3. \u904d\u5386\u5b57\u5178<\/h4>\n
          \n
        • \n

          \u904d\u5386\u6240\u6709\u952e\u503c\u5bf9：foreach (KeyValuePair kvp in dict)<\/p>\n<\/li>\n

        • \n

          \u4ec5\u904d\u5386\u952e：foreach (var key in dict.Keys)<\/p>\n<\/li>\n

        • \n

          \u4ec5\u904d\u5386\u503c：foreach (var value in dict.Values)<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

          list\u5e38\u89c1\u65b9\u6cd5\u4f7f\u7528numbers.Removenumbers.RemoveAt(0)\u5220\u9664\u7d22\u5f15\u4e3a0\u7684\u5143\u7d20numbers.RemoveAll(x>10)\u5220\u9664\u6240\u6709\u5927\u4e8e10numbers.RemoveRange(1,2)\u4ece\u7d22\u5f151\u5f00\u59cb\u5220\u9664\u4e24\u4e2a\u5143\u7d20numbers.Clearbool ex numbers.Countains(20)\u68c0\u67e5\u662f\u5426\u5305\u542b\u5143\u7d2020int index numbers.IndexOf(20)\u8fd4\u56de\u7b2c\u4e00\u4e2a\u5339\u914d\u5143\u7d20\u7684\u7d22\u5f15 \u672a\u627e\u5230\u8fd4\u56de-1int fount numbe<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[371,305],"topic":[],"class_list":["post-90610","post","type-post","status-publish","format-standard","hentry","category-server","tag-371","tag-305"],"yoast_head":"\n8\u67085\u65e5\u5b66\u4e60\u7b14\u8bb0 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/90610.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"8\u67085\u65e5\u5b66\u4e60\u7b14\u8bb0 - 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