Custom json serialization for each item in IEnumerable [duplicate]

Solution 1:

Turns out that for enumerables you have to use the JsonPropertyAttribute and the ItemConverterType property as follows:

[JsonProperty(ItemConverterType = typeof(StringEnumConverter))]
public IEnumerable<State> Data { get; set; }

[JsonProperty(ItemConverterType = typeof(MyDateTimeConverter))]
public IEnumerable<DateTime> XAxis { get; set; }

This is mentioned in the documentation as:

To apply a JsonConverter to the items in a collection, use either JsonArrayAttribute, JsonDictionaryAttribute or JsonPropertyAttribute and set the ItemConverterType property to the converter type you want to use.

You might be confused with JsonArrayAttribute, but it cannot target a property.