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  1. using System;
  2. using System.Collections;
  3. namespace CollectionApplications
  4. {
  5. class Program
  6. {
  7. 	static void Main(string[] args)
  8. 	{
  9. 		ArrayList arr=new ArrayList();
  10. 		arr.Add(1);
  11. 		arr.Add(10);
  12. 		arr.Add('A');
  13. 		arr.Add(1);
  14. 		int sum=0;
  15. 		foreach(int i in arr)
  16. 		{
  17. 			sum=sum+i;
  18. 			arr.Remove('A');
  19. 		}
  20. 		Console.WriteLine(sum);
  21. 		Console.ReadLine();
  22. 	}
  23. }
  24. }
Runtime error #stdin #stdout #stderr 0.01s 134976KB
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Standard input is empty
stdout
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Standard output is empty
stderr
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Unhandled Exception:
System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
  at System.Collections.ArrayList+ArrayListEnumeratorSimple.MoveNext () [0x00020] in <8f2c484307284b51944a1a13a14c0266>:0 
  at CollectionApplications.Program.Main (System.String[] args) [0x00067] in <d202c2244af44fb08fe9a7cf2ab756ee>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
  at System.Collections.ArrayList+ArrayListEnumeratorSimple.MoveNext () [0x00020] in <8f2c484307284b51944a1a13a14c0266>:0 
  at CollectionApplications.Program.Main (System.String[] args) [0x00067] in <d202c2244af44fb08fe9a7cf2ab756ee>:0
https://ideone.com/mH8OxE
language:
C# (gmcs 5.20.1)
created:
6 years ago
visibility:
public

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