Program.cs

// <copyright file="Program.cs" company="OpenTelemetry Authors">
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// </copyright>

using System.Diagnostics;
using OpenTelemetry;
using OpenTelemetry.Trace;

namespace GettingStarted;

public class Program
{
    private static readonly ActivitySource MyActivitySource = new(
        "MyCompany.MyProduct.MyLibrary");

    public static void Main()
    {
        using var tracerProvider = Sdk.CreateTracerProviderBuilder()
            .SetSampler(new AlwaysOnSampler())
            .AddSource("MyCompany.MyProduct.MyLibrary")
            .AddConsoleExporter()
            .Build();

        using var activity = MyActivitySource.StartActivity("SayHello");
        activity?.SetTag("foo", 1);
        activity?.SetTag("bar", "Hello, World!");
        activity?.SetTag("baz", new int[] { 1, 2, 3 });
    }
}