在C#中使用MongoDB序列化协变重写

public interface IEntity
{
    ObjectId Id { get; set; }
}

public abstract class EntityBase<T> : IEntity where T : IEntity
{
    [BsonId]
    public ObjectId Id { get; set; }
}

public class DerivedEntity : EntityBase<DerivedEntity>
{
    // 派生类特有的属性
}

var client = new MongoClient("mongodb://localhost:27017");
var database = client.GetDatabase("mydb");

var collection = database.GetCollection<DerivedEntity>("mycollection");
var derivedEntity = new DerivedEntity();
collection.InsertOne(derivedEntity);

var entities = collection.AsQueryable().ToList();