我正在將兩個List<Dictionary<string, object>>與我自己的IEqualityComparer<Dictionary<string, object>>實現進行比較，但是 GetHashCode 和 Equals 方法都沒有被調用。這是我自己的 IEqualityComparer 實現。public class TestEqualityComparer : IEqualityComparer<Dictionary<string, object>>{    public bool Equals(Dictionary<string, object> a, Dictionary<string, object> b)    {        return true; // breakpoint here    }    public int GetHashCode(Dictionary<string, object> obj)    {        return 0; // breakpoint here    }}這是一個實際的比較代碼。var a = new List<Dictionary<string, object>>();var b = new List<Dictionary<string, object>>();a.Add(new Dictionary<string, object> { ["id"] = 1, ["msg"] = "aaaaa" });a.Add(new Dictionary<string, object> { ["id"] = 2, ["msg"] = "bbbbb" });a.Add(new Dictionary<string, object> { ["id"] = 3, ["msg"] = "ccccc" });b.Add(new Dictionary<string, object> { ["id"] = 1, ["msg"] = "zzzzz" });b.Add(new Dictionary<string, object> { ["id"] = 2, ["msg"] = "bbbbb" });b.Add(new Dictionary<string, object> { ["id"] = 4, ["msg"] = "ddddd" });var except = a.Except(b, new TestEqualityComparer());當我運行上面的代碼時，斷點從未被觸發。有什么問題？