How to serialize immutable struct - serialization

Question

I am trying to serialize an immutable struct using JSon.NETand i do not how to do it .The result of the serialization is an empty json {}.I would prefer to use JsonNET and not something heavy like the BinaryFormatter.
Struct
[Serializable]
public struct Settings : IEquatable<Settings> {
private readonly (
TimeSpan from,
TimeSpan until,
TimeSpan repeatInterval,
TimeSpan popupInterval,
string notes
) _value;
[JsonIgnore]
public TimeSpan From => _value.from;
[JsonIgnore]
public TimeSpan Until => _value.until;
[JsonIgnore]
public TimeSpan Repeat => _value.repeatInterval;
[JsonIgnore]
public TimeSpan PopUpInterval => _value.popupInterval;
[JsonIgnore]
public string Notes => _value.notes;
public Settings(
TimeSpan from,
TimeSpan until,
TimeSpan repeatInterval,
TimeSpan popUpInterval,
string notes
) => _value = (
from,
until,
repeatInterval,
popUpInterval,
notes
);
public bool Equals(Settings other) => _value == other._value;
public override bool Equals(object obj) => obj is Settings other && this.Equals(other);
public override int GetHashCode() => _value.GetHashCode();
public override string ToString() => _value.ToString();
public static bool operator ==(Settings a, Settings b) => a.Equals(b);
public static bool operator !=(Settings a, Settings b) => !(a == b);
}
Program
static void Main(string[] args) {
Settings settings = new Settings(new TimeSpan(0),
new TimeSpan(0,1,1),
new TimeSpan(1,2,3),
new TimeSpan(2,4,3),
"adisor");
var obj = JsonConvert.SerializeObject(settings);
var newone = JsonConvert.DeserializeObject<Settings>(obj);
}

Answer 1

For serialization the JsonIgnore attribute need to be removed from target properties. For deserialization, constructor which will be used during deserialization need to be marked with JsonConstruct attribute. Optionally serialization names (properties) need to be reconciled with deserialization names (here constructor parameters) via JsonProperty attributes.
public TimeSpan From => _value.from;
public TimeSpan Until => _value.until;
public TimeSpan Repeat => _value.repeatInterval;
public TimeSpan PopUpInterval => _value.popupInterval;
public string Notes => _value.notes;
[JsonConstructor] //choose a constructor for deserialization
public Settings(
TimeSpan from,
TimeSpan until,
[JsonProperty("Repeat")]TimeSpan repeatInterval, //same name used for serialization
TimeSpan popUpInterval,
string notes
) => _value = (
from,
until,
repeatInterval,
popUpInterval,
notes
);