PlanTempusApp/Core/Telemetry/Class1.cs

using System.Text;
using System.Text.Json;

namespace Core.Telemetry
{
    public class SeqLogger
    {
        private readonly string _seqUrl;
        private readonly string _apiKey; // Optional
        HttpClient _httpClient;
        public SeqLogger(HttpClient httpClient, string seqUrl, string apiKey = null)
        {
            _seqUrl = seqUrl;
            _apiKey = apiKey;
            _httpClient = httpClient;
        }

        public async Task LogToSeq(string message, string level, Dictionary<string, object> properties)
        {

            var seqEvent = new Dictionary<string, object>
                        {
                            { "@t", DateTime.UtcNow.ToString("o") },
                            { "@mt", message },
                            { "@l", level }  // "Information", "Warning", "Error", etc.
                        };

            foreach (var prop in properties)
            {
                seqEvent.Add(prop.Key, prop.Value);
            }

            var content = new StringContent(
                JsonSerializer.Serialize(seqEvent),
                Encoding.UTF8,
                "application/vnd.serilog.clef");

            var response = await _httpClient.PostAsync("/ingest/clef?apiKey=Gt8hS9ClGNfOCAdswDlW", content);
            response.EnsureSuccessStatusCode();
        }
    }
}