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Internal Representation of Indexer Methods

Now that you have seen a few variations on the C# indexer method, you may be wondering how

indexers are represented in terms of CIL. If you were to open up the indexer of the current

PeopleCollection type, you would find that the C# compiler has created a property named Item,

which maps to the correct getter/setter methods:

.property instance class StringIndexer.Person Item(string)

{

.get instance class StringIndexer.Person

StringIndexer.PeopleCollection::get_Item(string)

.set instance void StringIndexer.PeopleCollection::set_Item(string,

class StringIndexer.Person)

} // end of property PeopleCollection::Item

The get_Item() and set_Item() methods are implemented like any other .NET property; for

example, consider the following set logic:

.method public hidebysig specialname instance void

set_Item(string name,

class StringIndexer.Person 'value') cil managed

{

// Code size       16 (0x10)

.maxstack  8

IL_0000:  nop

IL_0001:  ldarg.0

IL_0002:  ldfld  class [System]System.Collections.Specialized.ListDictionary

StringIndexer.PeopleCollection::listPeople

IL_0007:  ldarg.1

IL_0008:  ldarg.2

IL_0009:  callvirt instance void

[System]System.Collections.Specialized.ListDictionary::Add(object, object)

IL_000e:  nop

IL_000f:  ret

} // end of method PeopleCollection::set_Item