Dynamic.Json 1.3.0

.NET Standard 2.0
Install-Package Dynamic.Json -Version 1.3.0
dotnet add package Dynamic.Json --version 1.3.0
<PackageReference Include="Dynamic.Json" Version="1.3.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Dynamic.Json --version 1.3.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: Dynamic.Json, 1.3.0"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install Dynamic.Json as a Cake Addin
#addin nuget:?package=Dynamic.Json&version=1.3.0

// Install Dynamic.Json as a Cake Tool
#tool nuget:?package=Dynamic.Json&version=1.3.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Dynamic JSON

This is a .NET Standard 2.0 library providing a lightweight dynamic wrapper for super-neat, fast and low-allocating working with JSON, based on the new System.Text.Json.

This library is especially useful for prototyping and scripting when you have to keep the code as clean and easy-to-read as possible.


PM> Install-Package Dynamic.Json

How to use

Instantiate dynamic json:

// parse json from string/stream/etc, for example
var json = DJson.Parse(@"
    ""versionNumber"": 1,
    ""product_name"": ""qwerty"",
    ""items"": [ 1, 2, 3 ],
    ""settings"": {
        ""enabled"": false

// or read json from file
var json = DJson.Read("file.json");

// or get json from HTTP
var json = await DJson.GetAsync("https://api.com/endpoint");

// or use HttpClient extension
var json = await httpClient.GetJsonAsync("https://api.com/endpoint");

Use dynamic json as a normal class

You can access json props either like class properties (json.someProperty) or like dictionary elements (json["someProperty"]). Both methods are identical, however, the first one looks better 😃

int version = json.versionNumber;
string name = json.product_name;
int item = json.items[1];
int length = json.items.length; //or json.items.count, as you prefer
bool enabled = json.settings.enabled;

Flexible naming convention

camelCase and snake_case are common naming styles in JSON, but uncommon in C# where we use PascalCase for public properties. Therefore, for perfectionists like me DJson allows to access json props not only by their original names (e.g. json.ip_endpoint), but also by its PascalCase version (e.g. json.IPEndpoint). DJson will try to resolve names automatically.

var val = json.VersionNumber;
var str = json.ProductName;
var arr = json.Items[1];
var len = json.Items.Length; //or .Count
var obj = json.Settings.Enabled;

Enumerate arrays

You can enumerate json arrays in foreach or by implicit conversion to IEnumerable<dynamic>.

foreach (var item in json.Items)

var items = (IEnumerable<dynamic>)json.Items;
var sum = items.Where(x => x > 1).Sum(x => x);

Enumerate objects

You can enumerate json object props (string Name, dynamic Value) in foreach or by implicit conversion to IEnumerable<dynamic>.

foreach (var prop in json.Settings)
    Console.WriteLine($"{prop.Name}: {prop.Value}");

var props = (IEnumerable<dynamic>)json.Settings;
var names = props.Where(x => !x.Value).Select(x => x.Name);

Convert dynamic json to any valid type

While conversion to all built-in C# types is pretty transparent, you can also serialize json to any other type using implicit conversion.

var list = (List<int>)json.Items; // dynamic array -> List<int>
var settings = (MyClass)json.Settings; // dynamic object -> MyClass
var obj = (AnotherType)json;

Extract DateTime like a boss

People often use Unix time format in JSON and that's quite annoying to convert it to DateTime, so DJson does this for you automatically.

var json = DJson.Parse(@"
    ""time"": ""2020-09-23T21:12:16Z"",
    ""unix_time"": 1600895536,
    ""unix_time_ms"": 1600895536123

DateTime time = json.Time;
DateTime unixTime = json.UnixTime; // DJson automatically detects if it's Unix time in seconds
DateTime unixTimeMs = json.UnixTimeMs; // or if it's Unix time in milliseconds

What about performance?

One can think that using dynamic wrapper brings a huge overhead, but it's actually not. Here is a simple benchmark, comparing DJson with JsonDocument from System.Text.Json and JToken from Newtonsoft.Json:

|         Method |     Mean |     Error |    StdDev | Ratio | RatioSD |  Gen 0 | Allocated |
|--------------- |---------:|----------:|----------:|------:|--------:|-------:|----------:|
| SystemTextJson | 5.367 us | 0.0251 us | 0.0235 us |  1.00 |    0.00 | 0.5493 |   2.25 KB |
|          DJson | 6.947 us | 0.1375 us | 0.1286 us |  1.29 |    0.03 | 1.0300 |   4.16 KB |
|     Newtonsoft | 9.288 us | 0.1479 us | 0.1384 us |  1.73 |    0.03 | 2.1820 |   8.97 KB |

Of course, using .Deserialize<T>() would be even faster, but we're only talking about dynamic-like access, when you will likely spend a lot more time describing the types do deserialize your JSON to.


Feel free to create issues, feature requests and pull requests.

Cheers 🍻

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
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Showing the top 1 popular GitHub repositories that depend on Dynamic.Json:

Repository Stars
Version Downloads Last updated
1.3.0 17,952 3/13/2021
1.2.0 1,498 10/22/2020
1.1.0 221 10/7/2020