C# what is the point or benefit of an indexer?

Question

Doing some code reading and stumbled upon this snippet that I haven\'t seen before:

public SomeClass {
  public someInterface this[String strParameter] {
            


        

Answer 1

It's an operator overload. Useful if you are writing a collection class for example where it would make sense to access it using array notation, e.g. collection[someIndex].

You could of course write a collection.GetElement(someIndex) function equivalent, but it's a style/readability thing.