How does dynamic discovery work?

Answer Posted / swapna

ASP.NET maps the file name extension VSDISCO to an HTTP
handler that scans the host directory and subdirectories
for ASMX and DISCO files and returns a dynamically
generated DISCO document.

A client who requests a VSDISCO file gets back what appears
to be a static DISCO document.

Note that VSDISCO files are disabled in the release version
of ASP.NET. You can reenable them by uncommenting the
line in the <HTTPHANDLERS>section of Machine.config that
maps *.vsdisco to
System.Web.Services.Discovery.DiscoveryRequestHandler and
granting the ASPNET user account permission to read the
IIS metabase. However, Microsoft is actively discouraging
the use of VSDISCO files because they could represent a
threat to Web server security.

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