save dictionary to json in csharp

To save a dictionary as a json file in C#, you can use the System.Text.Json namespace that is available in .NET Core 3.0 or later. Follow these steps:

Start by adding the System.Text.Json namespace to your project:


main.cs
using System.Text.Json;
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Create a Dictionary<TKey, TValue> object that you want to save as json.


main.cs
Dictionary<string, int> myDict = new Dictionary<string, int>();
myDict.Add("apple", 2);
myDict.Add("banana", 3);
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Serialize the dictionary object to JSON using the JsonSerializer.Serialize() method. The Serialize() method will return a JSON formatted string.


main.cs
string jsonString = JsonSerializer.Serialize(myDict);
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Save the JSON string to a file using C#'s built-in file I/O functionality.


main.cs
File.WriteAllText(@"C:\data\myDictionary.json", jsonString);
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The complete code to save a dictionary as a json file in C# would look something like this:


main.cs
using System.Text.Json;
using System.Collections.Generic;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        Dictionary<string, int> myDict = new Dictionary<string, int>();
        myDict.Add("apple", 2);
        myDict.Add("banana", 3);

        string jsonString = JsonSerializer.Serialize(myDict);
        File.WriteAllText(@"C:\data\myDictionary.json", jsonString);
    }
}
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