Determines whether the IDictionary object contains an element with the specified key.
Assembly: mscorlib (in mscorlib.dll)
Implementations can vary in whether they allow the key to be null.
Starting with the .NET Framework 2.0, this method uses the collection’s objects’ Equals and CompareTo methods on item to determine whether item exists. In the earlier versions of the .NET Framework, this determination was made by using the Equals and CompareTo methods of the item parameter on the objects in the collection.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.