public class DatabaseDocument
{
 public Guid Id { get; set; }
 public string Name { get; set; } = string.Empty;
 public string Description { get; set; } = string.Empty;
}
public abstract class DataBaseDocumentBsonSerializer : IBsonIdProvider
{
 // Invert returns due to a bug in BsonSerializerExtensions SetDocumentIdIfMissing method
 public bool GetDocumentId(object document, out object id, out Type idNominalType, out IIdGenerator idGenerator)
 {
 DatabaseDocument doc = document as DatabaseDocument;
 ...
 idNominalType = typeof(Guid);
 idGenerator = new GuidGenerator();
 if (doc.Id == Guid.Empty)
 {
 id = null;
 return false;
 }
 id = doc.Id;
 return true;
 }
 public void SetDocumentId(object document, object id)
 {
 ...
 doc.Id = (Guid)id;
 }
}
public class DocuemntBsonSerializer : DataBaseDocumentBsonSerializer, IBsonSerializer<DatabaseDocument>{
 //IBsonSerializer<DatabaseDocument> implementation
}
public static void Main(string[] args){
 BsonSerializer.RegisterSerializer(typeof(DatabaseDocument), new RecipeBsonSerializer());
 //Create MongoClient and get an IMongoCollection<DatabaseDocument> instance
 collection.InsertOne(new DatabaseDocument());
}