Augment exception with id of current activity.

AugmentExceptionWithCurrentActivityId.cs

using System.Diagnostics;
using System.Runtime.ExceptionServices;

namespace Helpers;

public static class ExceptionHelper
{
    private const string ActivityIdKey = "ActivityId";

    private static readonly object Sync = new();

    private static readonly EventHandler<FirstChanceExceptionEventArgs> AugmentingWithCurrentActivityIdExceptionHandler = (_, e) =>
    {
        if (Activity.Current is Activity activity && !e.Exception.Data.Contains(ActivityIdKey))
        {
            e.Exception.Data[ActivityIdKey] = activity.Id;
        }
    };

    private static volatile bool _augmentingExceptionsWithCurrentActivityId;

    /// <summary>
    /// Tries to add to exceptions' <see cref="Exception.Data">data</see> dictionary an id 
    /// of <see cref="Activity.Current">current</see> <see cref="Activity">activity</see>,
    /// if any. This can be convenient to correlate logged exceptions with traces.
    /// </summary>
    public static void AugmentExceptionsWithCurrentActivityId()
    {
        if (_augmentingExceptionsWithCurrentActivityId)
        {
            return;
        }

        lock (Sync)
        {
            if (_augmentingExceptionsWithCurrentActivityId)
            {
                return;
            }

            _augmentingExceptionsWithCurrentActivityId = true;

            AppDomain.CurrentDomain.FirstChanceException += AugmentingWithCurrentActivityIdExceptionHandler;
        }
    }
}