namespace Test
{
    public static class ConfigureServices
    {
        private static readonly Lazy<IServiceProvider> _serviceProviderBuilder =
            new Lazy<IServiceProvider>(getServiceProvider, LazyThreadSafetyMode.ExecutionAndPublication);

        /// <summary>
        /// A lazy loaded thread-safe singleton
        /// </summary>
        public static IServiceProvider Instance { get; } = _serviceProviderBuilder.Value;

        private static IServiceProvider getServiceProvider()
        {
            var services = new ServiceCollection();
            
// TODO: add other services here ... services.AddSingleton ....

            return services.BuildServiceProvider();
        }
    }
}

var serviceCollection = new ServiceCollection();
serviceCollection.AddDataProtection();
var services = serviceCollection.BuildServiceProvider();
var protectionProvider = ActivatorUtilities.CreateInstance<ProtectionProvider>(services);
string result = protectionProvider.Encrypt(Str);