How to Convert a Dictionary to a JSON String in C# - Step by Step Examples

We can convert a dictionary to a JSON string in C# using the `JsonConvert.SerializeObject` method from the `Newtonsoft.Json` library. This example demonstrates how to declare and initialize a dictionary, use the `JsonConvert.SerializeObject` method to convert the dictionary to a JSON string, and print the resulting JSON string.

For example,

using System;
using System.Collections.Generic;
using Newtonsoft.Json;

class Program
{
    static void Main()
    {
        // Declare and initialize a dictionary
        Dictionary<int, string> myDictionary = new Dictionary<int, string>
        {
            {1, "One"},
            {2, "Two"},
            {3, "Three"}
        };

        // Convert the dictionary to a JSON string using JsonConvert.SerializeObject
        string jsonString = JsonConvert.SerializeObject(myDictionary);

        // Print the resulting JSON string
        Console.WriteLine("JSON string:");
        Console.WriteLine(jsonString);
    }
}

JSON string:
{"1":"One","2":"Two","3":"Three"}

We can convert a dictionary with complex values to a JSON string in C# using the `JsonConvert.SerializeObject` method from the `Newtonsoft.Json` library. This example demonstrates how to declare and initialize a dictionary with complex values, use the `JsonConvert.SerializeObject` method to convert the dictionary to a JSON string, and print the resulting JSON string.

For example,

using System;
using System.Collections.Generic;
using Newtonsoft.Json;

class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}

class Program
{
    static void Main()
    {
        // Declare and initialize a dictionary with complex values
        Dictionary<int, Person> myDictionary = new Dictionary<int, Person>
        {
            {1, new Person { Name = "John", Age = 30 }},
            {2, new Person { Name = "Jane", Age = 25 }}
        };

        // Convert the dictionary to a JSON string using JsonConvert.SerializeObject
        string jsonString = JsonConvert.SerializeObject(myDictionary, Formatting.Indented);

        // Print the resulting JSON string
        Console.WriteLine("JSON string:");
        Console.WriteLine(jsonString);
    }
}

JSON string:
{
  "1": {
    "Name": "John",
    "Age": 30
  },
  "2": {
    "Name": "Jane",
    "Age": 25
  }
}