MongoDB.Bson.Serialization.Serializers.DateTimeSerializer.Serialize C# (CSharp) Метод

        public override void Serialize(
            BsonWriter bsonWriter,
            Type nominalType,
            object value,
            IBsonSerializationOptions options)
        {
            var dateTime = (DateTime)value;
            var dateTimeSerializationOptions = EnsureSerializationOptions<DateTimeSerializationOptions>(options);

            DateTime utcDateTime;
            if (dateTimeSerializationOptions.DateOnly)
            {
                if (dateTime.TimeOfDay != TimeSpan.Zero)
                {
                    throw new BsonSerializationException("TimeOfDay component is not zero.");
                }
                utcDateTime = DateTime.SpecifyKind(dateTime, DateTimeKind.Utc); // not ToLocalTime
            }
            else
            {
                utcDateTime = BsonUtils.ToUniversalTime(dateTime);
            }
            var millisecondsSinceEpoch = BsonUtils.ToMillisecondsSinceEpoch(utcDateTime);

            switch (dateTimeSerializationOptions.Representation)
            {
                case BsonType.DateTime:
                    bsonWriter.WriteDateTime(millisecondsSinceEpoch);
                    break;
                case BsonType.Document:
                    bsonWriter.WriteStartDocument();
                    bsonWriter.WriteDateTime("DateTime", millisecondsSinceEpoch);
                    bsonWriter.WriteInt64("Ticks", utcDateTime.Ticks);
                    bsonWriter.WriteEndDocument();
                    break;
                case BsonType.Int64:
                    bsonWriter.WriteInt64(utcDateTime.Ticks);
                    break;
                case BsonType.String:
                    if (dateTimeSerializationOptions.DateOnly)
                    {
                        bsonWriter.WriteString(dateTime.ToString("yyyy-MM-dd"));
                    }
                    else
                    {
                        // we're not using XmlConvert.ToString because of bugs in Mono
                        if (dateTime == DateTime.MinValue || dateTime == DateTime.MaxValue)
                        {
                            // serialize MinValue and MaxValue as Unspecified so we do NOT get the time zone offset
                            dateTime = DateTime.SpecifyKind(dateTime, DateTimeKind.Unspecified);
                        }
                        else if (dateTime.Kind == DateTimeKind.Unspecified)
                        {
                            // serialize Unspecified as Local se we get the time zone offset
                            dateTime = DateTime.SpecifyKind(dateTime, DateTimeKind.Local);
                        }
                        bsonWriter.WriteString(dateTime.ToString("yyyy-MM-ddTHH:mm:ss.FFFFFFFK"));
                    }
                    break;
                default:
                    var message = string.Format("'{0}' is not a valid DateTime representation.", dateTimeSerializationOptions.Representation);
                    throw new BsonSerializationException(message);
            }
        }
    }