Assembly: System.Net (in System.Net.dll)
The Headers property is supported by the client HTTP stack, not the browser HTTP stack. The NotImplementedException is thrown if an application does not use the client HTTP stack for the HTTP response and tries to get the Headers property in the descendant class. The property can be used to determine if the Headers property is supported without the need to handle an exception.
By default, the browser HTTP stack is used by the HttpWebRequest and the HttpWebResponse class. An application can use the client HTTP stack by calling the RegisterPrefix method with the creator parameter set to the value returned by the ClientHttp property.
Silverlight for Windows PhoneThis member is present to support the .NET Compact Framework infrastructure in Silverlight for Windows Phone, and it is not intended to be used in your application code.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.