Compiler Error C3459

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'attribute': attribute allowed only on class indexer (default indexed property)

An attribute that is designed to be applied to a class indexer property was used incorrectly.

For more information, see How to: Use Indexed Properties.

Example

The following sample generates C3459.

// C3459.cpp
// compile with: /clr /c
public ref class MyString {
public:
   [System::Runtime::CompilerServices::IndexerName("Chars")]   // C3459
   property int Prop;
};

// OK
public ref class MyString2 {
   array<int>^ MyArr;
public:
   MyString2() {
      MyArr = gcnew array<int>(5);
   }

   [System::Runtime::CompilerServices::IndexerName("Chars")]   // OK
   property int default[int] {
      int get(int index) {
         return MyArr[index];
      }
      void set(int index, int value) {
         MyArr[index] = value;
      }
   }
};