I wish to produce a web-portal (for controlling hotel tasks), that ought to be around in the local network. Like a Front-finish technology I selected the Silverlight. Around the back-finish a some DBMS ought to be running and most likely Entity Framework is going to be used. Now you ask ,, what exactly are possible reasonable kinds of back-finish application and just how it might be reasonable for connecting it having a client Silverlight application? Just don't wish to produce a bike, if you will find any pretty much standard designs.