What scope does a using statement have without curly braces

Beginning with C# 8.0, the using keyword can be used as an attribute in the variable declarations of disposable objects (Reference). The semantics is as you would expect — the objects are auto-disposed at the end of the scope.

        public class Disposable : IDisposable
        {
            string name;

            public Disposable(string name)
            {
                this.name = name;
            }

            public void Dispose()
            {
                Console.WriteLine(name + " disposed");
            }

            public void Identify()
            {
                Console.WriteLine(name);
            }

            static void Main(string[] args)
            {
                using Disposable d1 = new Disposable("Using 1");
                Disposable d2 = new Disposable("No Using 2");
                using Disposable d3 = new Disposable("Using 3");
                Disposable d4 = new Disposable("No Using 4");
                d1.Identify();
                d2.Identify();
                d3.Identify();
                d4.Identify();
            }
        }

Output

Using 1
No Using 2
Using 3
No Using 4
Using 3 disposed
Using 1 disposed