ReadOnlyDictionary<TKey, TValue>.IDictionary<TKey, TValue>.Add Method (TKey, TValue)
Throws a NotSupportedException exception in all cases.
Assembly: mscorlib (in mscorlib.dll)
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. The IDictionary<TKey, TValue> interface specifies that the Add method should throw a NotSupportedException exception if the collection that implements the interface is read-only.
Available since 8
Available since 4.5
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Available since 8.1