How to serialize properties to lower case using System.Text.Json.JsonSerializer

Question

ASP.NET 5 MVC Core application controller consumes json API using

  using System.Text.Json;

    public async Task<IActionResult> EstoAPICall()
    {
  ...
  EstoOst estoOst;
  ....
  var json = JsonSerializer.Serialize(estoOst);
  StringContent content = new(json, Encoding.UTF8, "application/json");
  using var response = await httpClient.PostAsync("https://example.com", content);
  }

  public class EstoOst
  {
    public decimal Amount { get; set; }
    }

This returns error response because caller requires lower case amount but Serialize method returns upper case Amount.

How to fix this ? Switching to Newtosoft or changing class property name to lowercase seems to be not good solutions.

Answer 1

The official documentation illustrates how to control casing. For example, camel casing.

How to customize property names and values with System.Text.Json