An HttpListenerException is thrown when an error occurs processing a Hypertext Transfer Protocol request.
Associated Tips
- Make sure you are not attempting to register a URI prefix that is already registered.
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If the URI prefix is already registered, this exception will occur.
- Make sure your HTTP request is valid.
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This exception is thrown by the HttpListener class and its associated classes when an error occurs during the initialization of the HttpListener or while creating or sending a response to an HTTP request.
- If you are using the HttpListenerPrefixCollection.Add method, make sure the uriPrefix has not been already added.
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This exception will be thrown if another HttpListener has already added the prefix uriPrefix.
See Also