How to Deserialize JSON with Dynamic Keys into a C# List of Objects?

Dynamic key JSON deserialization in C#

In some cases, a web request may return a JSON response with dynamic keys, which creates challenges when deserializing to a C# object. For example, consider the following JSON response:

<code>{
"nasdaq_imbalance": 
{
    "name": "nasdaq_imbalance", 
    "group": "Market Data", 
    "description": null
},
"DXOpen IM": 
{
    "name": "DXOpen IM", 
    "group": "Daily",
    "description": null
}, 
"Float Shares": 
{
    "name": "Float Shares", 
    "group": "Daily", 
    "description": null
}, 
}</code>

The goal is to deserialize this JSON into a list of C# objects of type:

<code>public class Dataset    {
    public string name { get; set; } 
    public string group { get; set; } 
    public string description { get; set; } 
}</code>

To do this, we can leverage the power of Json.NET. The following code snippet shows how:

Dictionary<string, Dataset> datasets = JsonConvert.DeserializeObject<Dictionary<string, Dataset>>(json);

This line of code deserializes JSON into a dictionary where the keys are dynamic keys in the JSON response (e.g. "nasdaq_imbalance", "DXOpen IM", etc.) and the values ​​are instances of the Dataset class.

From this dictionary you can easily access the datasets via their dynamic keys and use them as needed. For example, to access the dataset with key "nasdaq_imbalance":

Dataset nasdaqImbalanceDataset = datasets["nasdaq_imbalance"];

Keep in mind that this solution only works if the dynamic keys are known in advance. If the keys can change dynamically, a more complex approach may be required.

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