How to deserialize stream to object using System.Text.Json APIs
I believe that documentation needs to be updated because .NET Core 3 has a method to read from a stream directly. Using it is straight-forward, assuming the stream is encoded in UTF8:
private static readonly JsonSerializerOptions Options = new JsonSerializerOptions();private static async Task<T> Deserialize<T>(HttpResponseMessage response){ var contentStream = await response.Content.ReadAsStreamAsync(); var result = await JsonSerializer.DeserializeAsync<T>(contentStream, Options); return result;}One thing to watch out for is that by default HttpClient will buffer the response content in-memory before returning unless you set the HttpCompletionOption to ResponseHeadersRead when invoking SendAsync:
var response = await client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, token);