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  1. using System;
  2. using System.Collections.Generic;
  3.  
  4. public class Test
  5. {
  6. 	public static void Main()
  7. 	{
  8. 		var set = new HashSet<int>();
  9.  
  10. 		Console.WriteLine(set.Add(42) ? "Added" : "Not added");
  11. 		Console.WriteLine(set.Count);
  12.  
  13. 		// повторим
  14. 		Console.WriteLine(set.Add(42) ? "Added" : "Not added");
  15. 		Console.WriteLine(set.Count);
  16. 	}
  17. }
Success #stdin #stdout 0.04s 24040KB
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stdin
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Standard input is empty
stdout
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Added
1
Not added
1
https://ideone.com/7z2EEO
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

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