# Serialisasi JSON (.NET)

> System.Text.Json, JsonSerializer, custom converters, naming policies, penanganan null

- 20 pertanyaan wawancara
- Mid-Level
- [Pertanyaan Wawancara: .NET](https://sharpskill.dev/id/technologies/dotnet/pertanyaan-wawancara.md)

## 1. Apa namespace utama untuk serialisasi JSON di .NET modern?

**Jawaban**

System.Text.Json adalah namespace resmi untuk serialisasi JSON di .NET Core 3.0+. Namespace ini secara bertahap menggantikan Newtonsoft.Json (Json.NET) karena lebih performan, terintegrasi ke framework, dan dioptimalkan untuk skenario modern. Newtonsoft.Json tetap tersedia melalui NuGet untuk kompatibilitas mundur atau fitur lanjutan yang tidak tersedia di System.Text.Json.

## 2. Metode mana yang digunakan untuk menserialisasi objek C# menjadi string JSON?

**Jawaban**

JsonSerializer.Serialize mengonversi objek C# menjadi string JSON. Metode statis ini menerima objek yang akan diserialisasi dan secara opsional JsonSerializerOptions untuk menyesuaikan perilaku. Serialize mengembalikan string, sedangkan SerializeToUtf8Bytes mengembalikan byte[] untuk mengoptimalkan performa dengan menghindari alokasi string.

## 3. Apa konvensi penamaan default System.Text.Json untuk properti JSON?

**Jawaban**

Secara default, System.Text.Json mempertahankan persis nama properti C# (PascalCase yang peka huruf besar/kecil). Jika properti C# bernama UserName, JSON akan berisi UserName. Untuk mendapatkan camelCase (userName), konfigurasikan JsonSerializerOptions dengan PropertyNamingPolicy = JsonNamingPolicy.CamelCase. Ini berbeda dari Newtonsoft.Json yang menggunakan camelCase secara default.

## 17 pertanyaan lagi tersedia

- Bagaimana cara mendeserialisasi string JSON menjadi objek C# bertipe?
- Atribut mana yang digunakan untuk mengabaikan properti selama serialisasi JSON?

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