from MSDN documentation:
"....
The DynamicDiscoveryDocument type supports the .NET Framework infrastructure and is not intended to be used directly from your code....."look into DiscoveryDocument class instead, see
http://msdn.microsoft.com/library/en-us/cpref/html/frlrfSystemWebServicesDiscoveryDiscoveryDocumentClassTopic.asp?frame=true
"....
The DynamicDiscoveryDocument type supports the .NET Framework infrastructure and is not intended to be used directly from your code....."look into DiscoveryDocument class instead, see
http://msdn.microsoft.com/library/en-us/cpref/html/frlrfSystemWebServicesDiscoveryDiscoveryDocumentClassTopic.asp?frame=true
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