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  1. using System;
  2. using System.Collections;
  3. using System.Collections.Generic;
  4.  
  5. public class Test
  6. {
  7. 	public static void Main(string[] args)
  8. 	{
  9. 		foreach (var i in new DangerousEnumerable())
  10. 		{
  11. 			Console.WriteLine(i);
  12. 			break;  // consumer decides to abort
  13. 		}
  14. 	}
  15. }
  16.  
  17. public class Resource : IDisposable
  18. { 
  19. 	public Resource() 
  20. 	{
  21. 		Console.WriteLine("Resource acquired!");
  22. 	}
  23.  
  24. 	public void Dispose()
  25. 	{
  26. 		Console.WriteLine("Resource disposed!");
  27. 	}
  28. }
  29.  
  30. public class DangerousEnumerable : IEnumerable<int>
  31. {
  32. 	public IEnumerator<int> GetEnumerator()
  33. 	{
  34. 		using (new Resource()) 
  35. 		{
  36. 			yield return 1;
  37. 			yield return 2;
  38. 		}
  39. 		Console.WriteLine("Finished!");
  40. 	}
  41.  
  42. 	IEnumerator IEnumerable.GetEnumerator()
  43. 	{
  44. 		return GetEnumerator();
  45. 	}
  46. }
Success #stdin #stdout 0.03s 33904KB
comments (?)
stdin
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Standard input is empty
stdout
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Resource acquired!
1
Resource disposed!
https://ideone.com/PrjAEc
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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