I have a Azure Function App in .net core 6, I was already using Microsoft.Extension.Logging for logging and everything was working perfectly, now I have a requirement to support structured logging so I decided to use Serilog, but after configuring Serilog logs are getting logged twice in application insights, ,

This is my startup.cs configuration for Serilog

public override void Configure(IFunctionsHostBuilder builder)
{
  var telemetryConfiguration = TelemetryConfiguration.CreateDefault();
  telemetryConfiguration.ConnectionString = Settings.ApplicationInsightsConnectionString;

  // Create and initialize the dependency tracking module
  var dependencyModule = new DependencyTrackingTelemetryModule();
  dependencyModule.Initialize(telemetryConfiguration);

  // Create the custom telemetry processor
  var telemetryProcessorChainBuilder = telemetryConfiguration.DefaultTelemetrySink.TelemetryProcessorChainBuilder;
  var configuration = builder.Services.BuildServiceProvider().GetService<IConfiguration>();
  telemetryProcessorChainBuilder.Use(next => new CustomTelemetryProcessor(next, configuration));

  // Build the telemetry processor chain
  telemetryProcessorChainBuilder.Build();

  Log.Logger = new LoggerConfiguration()
      .WriteTo.ApplicationInsights(telemetryConfiguration, TelemetryConverter.Traces)
      .CreateLogger();

  builder.Services.AddSingleton(telemetryConfiguration);
  builder.Services.AddSingleton(typeof(IAppLogger<>), typeof(AppLogger<>));
  
  // rest of the code...
 }

If I remove below code from Statup.cs then it’s not logging twice and only Serilog logs are shown, but I can’t remove that code as I also need custom telemetry processor.

So basically when I register custom telemetry processor it also activating Microsoft Logger and that’s why I’m getting logs twice as per my understating.

 // Create and initialize the dependency tracking module
  var dependencyModule = new DependencyTrackingTelemetryModule();
  dependencyModule.Initialize(telemetryConfiguration);

  // Create the custom telemetry processor
  var telemetryProcessorChainBuilder = telemetryConfiguration.DefaultTelemetrySink.TelemetryProcessorChainBuilder;
  var configuration = builder.Services.BuildServiceProvider().GetService<IConfiguration>();
  telemetryProcessorChainBuilder.Use(next => new CustomTelemetryProcessor(next, configuration));

  // Build the telemetry processor chain
  telemetryProcessorChainBuilder.Build();

How I can register custom telemetry processor with Serilog, without activating Microsoft logger?