private JsonConstructor example

Private_JsonConstructor.cs

using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json.Schema;
using Newtonsoft.Json.Serialization;

void Main()
{
	HasPrivateCtor e = new HasPrivateCtor( "123" );
	
	String js = JsonConvert.SerializeObject( e );
	
	HasPrivateCtor e2 = JsonConvert.DeserializeObject<HasPrivateCtor>( js )!;
	
	Boolean ok = ( e.A == e2.A && e.B == e2.B );
	if( !ok ) throw new InvalidOperationException();
}

public class HasPrivateCtor
{
	public HasPrivateCtor( String text )
	{
		this.A = text;
		this.B = text.Length;
	}
	
	[JsonConstructor]
	private HasPrivateCtor( [JsonProperty("a")] String a, [JsonProperty("b")] Int32 b  )
	{
		this.A = a;
		this.B = b;
	}
	
	[JsonProperty("a")]
	public String A { get; }
	
	[JsonProperty("b")]
	public Int32 B { get; }
}