/// <summary>
        /// Serializes the object to JSON.
        /// </summary>
        /// <param name="writer">The <see cref="T: Newtonsoft.Json.JsonWriter" /> to write to.</param>
        /// <param name="obj">The object to serialize to JSON.</param>
        internal static void Serialize(JsonWriter writer, BackupEntity obj)
        {
            var kind = obj.EntityKind;

            if (kind.Equals(BackupEntityKind.Application))
            {
                ApplicationBackupEntityConverter.Serialize(writer, (ApplicationBackupEntity)obj);
            }
            else if (kind.Equals(BackupEntityKind.Service))
            {
                ServiceBackupEntityConverter.Serialize(writer, (ServiceBackupEntity)obj);
            }
            else if (kind.Equals(BackupEntityKind.Partition))
            {
                PartitionBackupEntityConverter.Serialize(writer, (PartitionBackupEntity)obj);
            }
            else
            {
                throw new InvalidOperationException("Unknown EntityKind.");
            }
        }