Playground

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import System;

into namespace Destructors
{
	class Res
	{
		i32 id;

		public:
			new(i32 id) { this.id = id; }

			destroy() { Console.WriteLine($"destroy {id}"); }
	}

	Use(i32 id) : i32
	{
		Res r = new Res(id);
		return id;
	}

	Main()
	{
		Use(1);
		Console.WriteLine("after Use(1)");
		region
		{
			Res inside = new Res(2);
			Console.WriteLine("leaving the region");
		}
		Console.WriteLine("after the region");
		GC.Collect();
		Res filler = new Res(3);
		Console.WriteLine($"collections: {GC.CollectionCount()}");
		unsafe { delete filler; }
		Console.WriteLine("end of Main");
	}
}

Output

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Input

What Console.ReadLine() reads, one line at a time.

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