Gets the element at the specified index.
Assembly: System.Windows (in System.Windows.dll)
This indexer implementation specifically blocks a "set" usage. If you attempt to set a value using the indexer, an exception is thrown. You must remove and re-add to the ResourceDictionary in order to change a key-value pair.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.