ECMA-334 C# Language Specification

17.2.7.1: Member Names Reserved for Properties

For a property P (17.6) of type T, the following signatures are reserved: 
T get_P();  
void set_P(T value);

Both signatures are reserved, even if the property is read-only or write-only.

[Example: In the example 
using System;  
class A {  
   public int P {  
      get { return 123; }  
   }  
}  
class B: A {  
   new public int get_P() {  
      return 456;  
   }  
   new public void set_P(int value) {  
   }  
}  
class Test  
{  
   static void Main() {  
      B b = new B();  
      A a = b;  
      Console.WriteLine(a.P);  
      Console.WriteLine(b.P);  
      Console.WriteLine(b.get_P());  
   }  
}
a class A defines a read-only property P, thus reserving signatures for get_P and set_P methods. A class B derives from A and hides both of these reserved signatures. The example produces the output: 
123  
123  
456
end example]