using var graphQLClient = new GraphQLHttpClient(local, new NewtonsoftJsonSerializer());
var request = new GraphQLRequest{...}
var graphQLResponse = await graphQLClient.SendQueryAsync<ValueResponse>(request);
return System.Text.Json.JsonSerializer.Serialize(graphQLResponse, new JsonSerializerOptions { WriteIndented = true });
return "abc" for english text field,
and "\u0422\u0435\u043A\u0443\u0449\u0438\u0439 \u0422\u04201" for russian text field
please tell me how to set encoding