IServiceCollectionExtensions.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using Microsoft.ApplicationInsights.Extensibility;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;

namespace YourNamespace
{
	public static class IServiceCollectionExtensions
	{
		public static IServiceCollection AddYourDependencies(
			this IServiceCollection services
		)
		{
			// add other dependencies
			
			services.TryAddTransient<TrackRequestBodyAttribute>();

			return services;
		}
	}
}