Json.NET MissingMemberHandling setting

Question

I would like Json.NET to throw a JsonSerializationException when the Json string is missing a property that the C# class requires.

Answer 1

You have to set the P2 property to mandatory with the JsonPropertyAttribute

public class ApiMessage
{
    public string P1 { get; set; }
    [JsonProperty(Required = Required.Always)]
    public string P2 { get; set; }
}

With your example, you will get an JsonSerializationException.

Hope it helps!