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  1. using System;
  2.  
  3. public class Subclase2
  4. {
  5.    // Definiciones restantes sobre la clase Object
  6.  
  7.    protected override string ToString()  // Esto es correcto.
  8.    {
  9.       // Implementación de ToString en Subclase
  10.       return "";
  11.    }
  12.  
  13.    public static void Main()
  14.    {
  15.  
  16.    }
  17. }
Compilation error #stdin compilation error #stdout 0s 33480KB
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stdin
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Standard input is empty
compilation info 
prog.cs(7,30): error CS0507: `Subclase2.ToString()': cannot change access modifiers when overriding `public' inherited member `object.ToString()'
/usr/lib/mono/2.0/mscorlib.dll (Location of the symbol related to previous error)
Compilation failed: 1 error(s), 0 warnings
stdout
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Standard output is empty
https://ideone.com/J37Dzg
Demostración de la restricción de modificador de acceso en C#.
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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