Get _id of an inserted document in MongoDB?

Question

say I have a product listing. When I add a new product I save it using something like

var doc=products.Insert(p);

The pro

Answer 1

The Insert method automatically sets the property that is declared as the BSON ID of the model.

If declared as follows...

[BsonId]
public ObjectId Id { get; set; }

... then the Id field will contain the default (new, unique) BSON ID of the object after inserting the object into a collection:

coll.Insert(obj);
// obj.Id is now the BSON ID of the object