c# list中的removeAll方法 两个List集合去除交集部分

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static List<Object> list = new List<Object>() { 1,2,4,"a","b"};         static List<Object> list1 = new List<Object>() { 1, 2, 3,"a","c" };         static void Main(string[] args)         {             list1.RemoveAll(it => list.Contains(it));             foreach (Object i in list1)             {                 Console.WriteLine(i);             }             Console.ReadKey();