C# - Indexer at its meaningful application

Question

I understand indexer enable us to access a collection within a class as though the class itself were an array. Suppose we are developing a project ,where do we fit the real pratical usage (example may help) of such indexers ?

Accepted Answer

Look to almost any of the collection classes in the framework for an example. If I were to retrieve an item from a hashtable in a language without an indexer, I would use syntax like:

```
object o = table.getvalue(key);
```

where an indexer allows somewhat simpler syntax:

```
object o = table[key];
```

(purposely ignoring typing/generics issues in the samples above)

C# - Indexer at its meaningful application

Solution

Problem