Thomas Levesque • 6/27/2020

Exposing a custom type as a JSON string in an ASP.NET Core API

This technical article demonstrates methods to expose a custom C# type (like a Duration struct) as a concise JSON string in an ASP.NET Core API. It compares using JSON.NET's automatic TypeConverter support with creating a custom JsonConverter for System.Text.Json to achieve cleaner, more readable serialization output, such as converting a verbose object into a compact ISO 8601 format string.

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#api design #JSON Serialization #Aspnet Core