otel-dotnet.csproj

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
    <RootNamespace>otel_dotnet</RootNamespace>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Extensions.Logging" Version="6.0.0" />
    <PackageReference Include="OpenTelemetry" Version="1.3.0" />
    <PackageReference Include="OpenTelemetry.Exporter.Console" Version="1.3.0" />
    <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.0.0-rc9.4" />
    <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.0.0-rc9.4" />
  </ItemGroup>

</Project>

output.txt

LogRecord.Timestamp:               2022-08-21T23:26:22.1933290Z
LogRecord.TraceId:                 8b9899797fe5f3f083bdd57e066f9e1a
LogRecord.SpanId:                  7a9a6814bfdaed76
LogRecord.TraceFlags:              Recorded
LogRecord.CategoryName:            Program
LogRecord.LogLevel:                Information
LogRecord.State:                   Hello from Person { Name = Phillip, Age = 31 }.

Resource associated with LogRecord:
service.name: MyCompany.MyProduct.MyService
service.version: 1.0.0
service.instance.id: 6360402a-71c7-4074-949c-d220ef853740

Activity.TraceId:          8b9899797fe5f3f083bdd57e066f9e1a
Activity.SpanId:           7a9a6814bfdaed76
Activity.TraceFlags:           Recorded
Activity.ParentSpanId:    8bf8605a9de554f8
Activity.ActivitySourceName: MyCompany.MyProduct.MyService
Activity.DisplayName: app.manual-span
Activity.Kind:        Internal
Activity.StartTime:   2022-08-21T23:26:22.1929930Z
Activity.Duration:    00:00:00.0149910
Activity.Tags:
    app.manual-span.message: Adding custom spans is also super easy!
Resource associated with Activity:
    service.name: MyCompany.MyProduct.MyService
    service.version: 1.0.0
    service.instance.id: 6360402a-71c7-4074-949c-d220ef853740

Activity.TraceId:          8b9899797fe5f3f083bdd57e066f9e1a
Activity.SpanId:           8bf8605a9de554f8
Activity.TraceFlags:           Recorded
Activity.ActivitySourceName: OpenTelemetry.Instrumentation.AspNetCore
Activity.DisplayName: /
Activity.Kind:        Server
Activity.StartTime:   2022-08-21T23:26:22.1341990Z
Activity.Duration:    00:00:00.0927820
Activity.Tags:
    http.host: localhost:7026
    http.method: GET
    http.target: /
    http.url: https://localhost:7026/
    http.user_agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36
    http.status_code: 200
   StatusCode : UNSET
Resource associated with Activity:
    service.name: MyCompany.MyProduct.MyService
    service.version: 1.0.0
    service.instance.id: 6360402a-71c7-4074-949c-d220ef853740

Program.cs

using OpenTelemetry;
using OpenTelemetry.Logs;
using OpenTelemetry.Resources;
using OpenTelemetry.Trace;

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

var appResourceBuilder = ResourceBuilder.CreateDefault()
    .AddService(serviceName: Telemetry.ServiceName, serviceVersion: Telemetry.ServiceVersion);

using var tracerProvider = Sdk.CreateTracerProviderBuilder()
    .AddSource(Telemetry.ServiceName)
    .SetResourceBuilder(appResourceBuilder)
    .AddConsoleExporter()
    .AddAspNetCoreInstrumentation()
    .Build();

using var loggerFactory = LoggerFactory.Create(builder =>
{
    builder.AddOpenTelemetry(options =>
    {
        options.SetResourceBuilder(appResourceBuilder)
            .AddConsoleExporter();
    });
});
var logger = loggerFactory.CreateLogger<Program>();

app.MapGet("/", () =>
{
    using var activity = Telemetry.MyActivitySource.StartActivity("app.manual-span");
    activity?.AddTag("app.manual-span.message", "Adding custom spans is also super easy!");

    logger.LogInformation("Hello from {person}.", new Person("Phillip", 31));
});

app.Run();

record Person(string Name, int Age);

Telemetry.cs

using System.Diagnostics;

public static class Telemetry
{
    public static readonly string ServiceName = "MyCompany.MyProduct.MyService";
    public static readonly string ServiceVersion = "1.0.0";
    public static readonly ActivitySource MyActivitySource = new(ServiceName);
}