using System.Text.Json; using System.Text.Json.Serialization; namespace View_by_Distance.Shared.Models; public class MetadataFile : Properties.IMetadataFile { protected readonly MetadataFileId _Id; // {-_-}SingletonClass protected readonly MetadataFileCollection _Collection; // {-_-}SingletonClass public MetadataFileId Id => _Id; // {-_-}SingletonClass public MetadataFileCollection Collection => _Collection; // {-_-}SingletonClass [JsonConstructor] public MetadataFile ( MetadataFileId id, MetadataFileCollection collection ) { _Id = id; // {-_-}SingletonClass _Collection = collection; // {-_-}SingletonClass } public override string ToString() { string result = JsonSerializer.Serialize(this, new JsonSerializerOptions() { WriteIndented = true }); return result; } // ... }