Indexers

• Indexer is a concept of using an object like an array.
  

  Syntax:
  

  <modifier> <return type> this [argument list]
  

• Indexers are implemented through get and set assessors for the [] operator. . The get and set assessors are invoked as methods with the parameter list specified in the indexer declaration.
  
• Indexer method name must be this.
  
• One class can have only one indexer.
  
• The modifier can be private, public, protected or internal.
  
• Indexers must be instance-based, that is, they cannot be static i.e., C# don't have the concept of static indexers
  
• A base class indexer is inherited to the derived class.