How to Efficiently Save JSON Data in C#?

C# JSON data saving method

This article introduces several methods of writing JSON data to files in C#:

Method 1: Use Newtonsoft Json.Net

<code class="language-csharp">List<data> _data = new List<data>();
_data.Add(new data()
{
    Id = 1,
    SSN = 2,
    Message = "A Message"
});

string json = JsonConvert.SerializeObject(_data.ToArray());

// 将字符串写入文件
System.IO.File.WriteAllText(@"D:\path.txt", json);</code>

Method 2: Use System.Text.Json (.NET Core 3.0 and above)

<code class="language-csharp">using System.Text.Json;

List<data> _data = new List<data>();
_data.Add(new data()
{
    Id = 1,
    SSN = 2,
    Message = "A Message"
});

string json = JsonSerializer.Serialize(_data);
File.WriteAllText(@"D:\path.json", json);</code>

Method 3: Use StreamWriter (more efficient)

<code class="language-csharp">// 打开文件流
using (StreamWriter file = File.CreateText(@"D:\path.txt"))
{
    JsonSerializer serializer = new JsonSerializer();
    // 直接将对象序列化到文件流
    serializer.Serialize(file, _data);
}</code>

Please note that in order to ensure the validity of the JSON format, correct brackets need to be used.

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