asp.net - An error occurred loading a configuration file: Failed to map the path '/' -

i error occurred loading configuration file: failed map path '/'. when try run following line path of web.config

configuration config =system.web.configuration.webconfigurationmanager.openwebconfiguration("~"); 

i running windows 7 , visual studio 2010 , .net framework 4.0 . know issue resolved running visual studio administrator , have run same code numerous times before doing run administrator today running administrator not resolving issue . have run same code on laptops of team mates , code works , when run code on laptop not work .

i have tried , there way can give absolute path somehow make work temporarily , can windows issue because in bad condition lately . kindly wasting lot of time

i having same problem , using same workaround of launching visual studio administrator.

finally tried tests , got this: if create filemap web.config application loads config without administrator privileges.

i have used example http://msdn.microsoft.com/en-us/library/system.web.configuration.webconfigurationmanager.openmappedwebconfiguration(v=vs.110).aspx modifications:

    public static configuration getconfiguration()     {         if (hostingenvironment.applicationvirtualpath == "/")             return webconfigurationmanager.openwebconfiguration("~/web.config");          webconfigurationfilemap filemap = createfilemap(hostingenvironment.applicationvirtualpath);         // configuration object mapped virtual directory.         return webconfigurationmanager.openmappedwebconfiguration(filemap, hostingenvironment.applicationvirtualpath);     }      private static webconfigurationfilemap createfilemap(string applicationvirtualpath)     {          webconfigurationfilemap filemap =                new webconfigurationfilemap();          // physical directory app runs.          // we'll use map virtual directories          // defined next.           string physdir = hostingenvironment.applicationphysicalpath;          // create virtualdirectorymapping object use          // root directory virtual directory          // named config.           // note: must assure have physical subdirectory          // named config in curremt physical directory          // application runs.         virtualdirectorymapping vdirmap =             new virtualdirectorymapping(physdir, true);          // add vdirmap virtualdirectories collection           // assigning virtual directory name.         filemap.virtualdirectories.add(applicationvirtualpath, vdirmap);          // create virtualdirectorymapping object use          // default directory virtual           // directories.         virtualdirectorymapping vdirmapbase =             new virtualdirectorymapping(physdir, true, "web.config");          // add virtual directory mapping collection.         filemap.virtualdirectories.add("/", vdirmapbase);          // return mapping.          return filemap;     } 

i think not cool fix, works , can enclosed in #if debug section.

with these deducing when launch visual studio web development server having set virtual path setting "/myapplication", if has been launched administrator privileges creates mappings not create when not having privileges. hypothesis not verify.

i hope others!