<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />

JavaScriptDateTimeConverter

Converts a DateTime to and from a JavaScript Date constructor (e.g. new Date(52231943)).
using Newtonsoft.Json.Utilities; using System; using System.Globalization; using System.Runtime.CompilerServices; namespace Newtonsoft.Json.Converters { [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(0)] public class JavaScriptDateTimeConverter : DateTimeConverterBase { public override void WriteJson(JsonWriter writer, [System.Runtime.CompilerServices.Nullable(2)] object value, JsonSerializer serializer) { if (!(value is DateTime)) throw new JsonSerializationException("Expected date object value."); long value2 = DateTimeUtils.ConvertDateTimeToJavaScriptTicks(((DateTime)value).ToUniversalTime()); writer.WriteStartConstructor("Date"); writer.WriteValue(value2); writer.WriteEndConstructor(); } [return: System.Runtime.CompilerServices.Nullable(2)] public override object ReadJson(JsonReader reader, Type objectType, [System.Runtime.CompilerServices.Nullable(2)] object existingValue, JsonSerializer serializer) { if (reader.TokenType == JsonToken.Null) { if (!ReflectionUtils.IsNullable(objectType)) throw JsonSerializationException.Create(reader, "Cannot convert null value to {0}.".FormatWith(CultureInfo.InvariantCulture, objectType)); return null; } if (reader.TokenType != JsonToken.StartConstructor || !string.Equals(reader.Value?.ToString(), "Date", StringComparison.Ordinal)) throw JsonSerializationException.Create(reader, "Unexpected token or value when parsing date. Token: {0}, Value: {1}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType, reader.Value)); if (!JavaScriptUtils.TryGetDateFromConstructorJson(reader, out DateTime dateTime, out string errorMessage)) throw JsonSerializationException.Create(reader, errorMessage); return dateTime; } } }