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  1. using System;
  2. using System.Collections.Generic;
  3.  
  4. namespace AddingReversedNumbers
  5. {
  6. 	public class MyDerivedClass : MyBaseClass, IMyInterface
  7. 	{
  8. 		public int InterfaceProperty { get; set; }
  9. 		public int DerivedClassProperty { get; set; }
  10. 		public List<int> DerivedClassList { get; set; }
  11. 	}
  12.  
  13. 	public class MyBaseClass
  14. 	{
  15. 		public int BaseClassProperty { get; set; }
  16. 	}
  17.  
  18. 	public interface IMyInterface
  19. 	{
  20. 		int InterfaceProperty { get; set; }
  21. 	}
  22.  
  23.  
  24. 	class Program
  25. 	{
  26. 		static void Main()
  27. 		{
  28. 			//// This code works just fine.
  29. 			//var derivedList = new List<MyDerivedClass>();
  30. 			//derivedList.Add(new MyDerivedClass { BaseClassProperty = 10, DerivedClassProperty = 20, InterfaceProperty = 30 });
  31. 			//derivedList.Add(new MyDerivedClass { BaseClassProperty = 20, DerivedClassProperty = 40, InterfaceProperty = 60 });
  32. 			//var baseList = derivedList.ConvertAll(x => (MyBaseClass)x);
  33.  
  34. 			// This code breaks when ConvertAll() is called.
  35. 			var baseList = new List<MyBaseClass>();
  36. 			baseList.Add(new MyBaseClass{ BaseClassProperty = 10 });
  37. 			baseList.Add(new MyBaseClass{ BaseClassProperty = 20 });
  38. 			var derivedList = baseList.ConvertAll(x => (MyDerivedClass)x);
  39. 		}
  40. 	}
  41. }
Runtime error #stdin #stdout 0.03s 39560KB
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https://ideone.com/CaXQS
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
secret

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