IndexerName attribute for abstract classes

Question

I am trying to rename my indexer property using the IndexerName attribute in my abstract classes. But it still shows a compilation error. Type "XXX" already contains a definition for "Item" .

Abstract class:

public abstract class MyAbstract
{
    [IndexerName("Indexer")]
    public abstract string this[string propertyName]
    {
        get;
    }
}

Concrete class:

public class MyConcrete : MyAbstract
{
    string item;

    public string Item
    {
        get { return item; }
        set { item = value; }
    }

    public override string this[string propertyName]
    {
        get { return propertyName; }
    }
}

Compilation Error:

The type "MyConcrete" already contains a definition for "Item".

I tried to put IndexerName in the override of the indexer and show the error message "Cannot set the IndexerName attribute on the override marked by the indexer "

How to use IndexerName for abstract classes?

Thanks in advance.

Answer 1

, Item - , IndexerName .

Answer 2

, . IndexerNameAttribute , . , , , . , , , . , , Item ( , ).

[AttributeUsage(AttributeTargets.Property, Inherited = true)]
public sealed class IndexerNameAttribute : Attribute

.

//base abstract class
public abstract string GetItem(string propertyName);
//and implement it in the derived classes