ReadOnlyDictionary<TKey, TValue>.IDictionary<TKey, TValue>.Item Property (TKey)

.NET Framework (current version)

The .NET API Reference documentation has a new home. Visit the .NET API Browser on to see the new experience.

Gets the element that has the specified key.

Namespace:   System.Collections.ObjectModel
Assembly:  mscorlib (in mscorlib.dll)

TValue IDictionary<TKey, TValue>.this[
	TKey key
] { get; set; }


Type: TKey

The key of the element to get or set.

Property Value

Type: TValue

The element that has the specified key.

Exception Condition

key is null.


The property is retrieved and key is not found.


The property is set.

This member is an explicit interface member implementation. It can be used only when the ReadOnlyDictionary<TKey, TValue> instance is cast to an IDictionary<TKey, TValue> interface.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.5
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
Return to top