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

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

For example,

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

class Program
{
    static void Main()
    {
        // Declare a JSON string
        string jsonString = "{\"1\":\"One\",\"2\":\"Two\",\"3\":\"Three\"}";

        // Convert the JSON string to a dictionary using JsonConvert.DeserializeObject
        Dictionary<int, string> myDictionary = JsonConvert.DeserializeObject<Dictionary<int, string>>(jsonString);

        // Print the resulting dictionary
        Console.WriteLine("Dictionary from JSON string:");
        foreach (var kvp in myDictionary)
        {
            Console.WriteLine("Key: {0}, Value: {1}", kvp.Key, kvp.Value);
        }
    }
}

Dictionary from JSON string:
Key: 1, Value: One
Key: 2, Value: Two
Key: 3, Value: Three

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

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 a JSON string with complex values
        string jsonString = "{\"1\":{\"Name\":\"John\",\"Age\":30},\"2\":{\"Name\":\"Jane\",\"Age\":25}}";

        // Convert the JSON string to a dictionary using JsonConvert.DeserializeObject
        Dictionary<int, Person> myDictionary = JsonConvert.DeserializeObject<Dictionary<int, Person>>(jsonString);

        // Print the resulting dictionary
        Console.WriteLine("Dictionary from JSON string:");
        foreach (var kvp in myDictionary)
        {
            Console.WriteLine("Key: {0}, Name: {1}, Age: {2}", kvp.Key, kvp.Value.Name, kvp.Value.Age);
        }
    }
}

Dictionary from JSON string:
Key: 1, Name: John, Age: 30
Key: 2, Name: Jane, Age: 25