MongoDB.Bson.Serialization.BsonClassMapSerializer.SetDocumentId C# (CSharp) Метод

        public void SetDocumentId(object document, object id)
        {
            var documentType = document.GetType();
            if (documentType.IsValueType)
            {
                var message = string.Format("SetDocumentId cannot be used with value type {0}.", documentType.FullName);
                throw new BsonSerializationException(message);
            }

            var idMemberMap = _classMap.IdMemberMap;
            if (idMemberMap != null)
            {
                idMemberMap.Setter(document, id);
            }
            else
            {
                var message = string.Format("Class {0} has no Id member.", document.GetType().FullName);
                throw new InvalidOperationException(message);
            }
        }