Research of ADO.NET Database Connection Pool
Cai Yu · Computer Programming Skills & Maintenance · 2009
ADO.NET support connection pool,when connection string is the same ,ADO.NET look for a free connection from the pool,if find one then use it,or create a new connection.When the connection is close,it's not really be destroyed,it will be put back into the pool for next usage. In other situation,pool can be disabled by assigned for diffirent conditions.