public IDisposable BeginScope <TState>(TState state)
        {
            var scope = new TraceScope(_name, state);

            scope.Context = TraceScope.Current?.Context ?? GetNewActivityContext();
            return(TraceScope.Push(scope, _store));
        }
        public static IDisposable Push(TraceScope scope, TraceStore store)
        {
            if (scope == null)
            {
                throw new ArgumentNullException(nameof(scope));
            }

            if (store == null)
            {
                throw new ArgumentNullException(nameof(store));
            }

            //if (scope._name.Equals("Microsoft.AspNetCore.Hosting.Internal.WebHost", StringComparison.OrdinalIgnoreCase))
            //{
            //    return new DisposableAction(() =>
            //    {
            //        //Current.Node.EndTime = DateTimeOffset.UtcNow;
            //        //Current = Current.Parent;
            //    });
            //}

            var temp = Current;

            Current        = scope;
            Current.Parent = temp;

            Current.Node = new ScopeNode()
            {
                StartTime = DateTimeOffset.UtcNow,
                State     = Current._state,
                Name      = Current._name
            };

            if (Current.Parent != null)
            {
                Current.Node.Parent = Current.Parent.Node;
                Current.Parent.Node.Children.Add(Current.Node);
            }
            else
            {
                Current.Context.Root = Current.Node;
                store.AddActivity(Current.Context);
            }

            return(new DisposableAction(() =>
            {
                Current.Node.EndTime = DateTimeOffset.UtcNow;
                Current = Current.Parent;
            }));
        }