title: Database connection in WCF
body: <p>There is WCF Client (from excel connected to service via dll), 
  The server code connnects to database via singelton, if the number of clients increase , does the DB Connection pooling automatically work(DB is SQLServer),</p>
  
  <p>if it does not use connection pooling, how to ensure each WCF Client can have its own database connection, and it will be used only needed.</p>