Use TTL(Time To Live) in MongoDB C# Driver

在 MongoDB 內使用 TTL

TTL == Time To Live
用於存放暫存資料
var collection = _database.GetCollection<Student>("Students");

舊的實作方法(已過時)

var index = collection.Indexes.CreateOne(Builders<Student>.IndexKeys.Ascending("expireAt"),
            new CreateIndexOptions { ExpireAfter = new TimeSpan(0, 0, 20) });

新的實作方法

var options = new CreateIndexOptions { ExpireAfter = new TimeSpan(0, 0, 20) };
var index = new CreateIndexModel<Student>(Builders<Student>.IndexKeys.Ascending("expireAt"),options);
collection.Indexes.CreateOne(index);