Appconsole writes the current app. Config connection string to the Webcofig under the Web project under the same solution

First, to be able to read and write webconfig, need to quote System.Web.Configuration;

Of course read AppConfig need to have system.configuration;

Class Program {static void Main (string[] args) {string S=system.configuration.configura tionmanager.connectionstrings["BMS"].
            ConnectionString; String path = Path.Combine (Directory.getparent (System.IO.Directory.GetCurrentDirectory ()).
            Parent.Parent.FullName, "Mvcapp");
            virtualdirectorymapping VDM = new Virtualdirectorymapping (path, true);
            WebConfigurationFileMap wcfm = new WebConfigurationFileMap (); Wcfm.
            Virtualdirectories.add ("/", VDM); System.Configuration.Configuration config =
            System.Web.Configuration.WebConfigurationManager.OpenMappedWebConfiguration (wcfm, "/"); Connectionstringssection connsection = (connectionstringssection) config.

            GetSection ("connectionStrings"); if (connsection.connectionstrings["BMS"]== null) {connectionstringsettings c=new connectionst
                Ringsettings ();
                C.name = "BMS"; C.connectionstring = S;
                CONNSECTION.CONNECTIONSTRINGS.ADD (c); Config.
            Save (); } else {connsection.connectionstrings["BMS"].
                ConnectionString = s; Config.
            Save (); }//appsettingssection appsection = (appsettingssection) config.
            GetSection ("appSettings");
            if (appsection.settings["BMS"] = = NULL)//{//APPSECTION.SETTINGS.ADD ("BMS", s); Config.
            Save ();
            } console.write (s);
        Console.readkey (); }
    }