Can Json.Net Configure Private Setter Behavior Without Modifying Source Code?

Configuring Private Setter Behavior in Json.Net

While Json.Net offers an attribute to address private setters, a default option for this functionality is often sought after. In the absence of source code modifications, the question arises: is there a configurable setting to achieve this behavior?

Answer

Option 1: Using the [JsonProperty] Attribute

Instead of relying on a specific attribute, simply employing the [JsonProperty] attribute serves the purpose of populating readonly properties during deserialization. An example:

[JsonProperty]
public Guid? ClientId { get; private set; }

Option 2: Constructor-Based Solution

An alternative approach involves creating a constructor with a parameter matching the private property:

public class Foo
{
    public string Bar { get; }

    public Foo(string bar)
    {
        Bar = bar;
    }
}

This enables the following:

string json = "{ \"bar\": \"Stack Overflow\" }";

var deserialized = JsonConvert.DeserializeObject<Foo>(json);
Console.WriteLine(deserialized.Bar); // Stack Overflow

The advantages of this approach include:

• No attribution of properties is required.
• Compatibility with both { get; private set; } and { get; }.

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