ReadOnlyDictionary(Of TKey, TValue).ICollection(Of KeyValuePair(Of TKey, TValue)).Add Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Throws a NotSupportedException exception in all cases.
Assembly: mscorlib (in mscorlib.dll)
'Declaration Private Sub Add ( _ item As KeyValuePair(Of TKey, TValue) _ ) Implements ICollection(Of KeyValuePair(Of TKey, TValue)).Add
Parameters
- item
- Type: System.Collections.Generic.KeyValuePair(Of TKey, TValue)
The object to add to the dictionary.
Implements
ICollection(Of T).Add(T)| Exception | Condition |
|---|---|
| NotSupportedException | In all cases. |
This member is an explicit interface member implementation. It can be used only when the ReadOnlyDictionary(Of TKey, TValue) instance is cast to an ICollection(Of T) interface. The ICollection(Of T) interface specifies that the Add method should throw a NotSupportedException exception if the collection that implements the interface is read-only.