'Declaration
 
Public Default Property Item( _
   ByVal key As TKey _
) As TValue

'Usage
 
Dim instance As ImGearReadOnlyDictionary(Of TKey,TValue)
Dim key As TKey
Dim value As TValue
 
instance.Item(key) = value
 
value = instance.Item(key)

public TValue this[ 
   TKey key
]; {get; set;}

public: __property TValue* get_Item   TKey* key
;
public: __property void set_Item   TKey* key,
   TValue* value
;

public:
property TValue^ default [TKey^] {
   TValue^ get(TKey^ key);
   void set (TKey^ key, TValue^ value);
}