By default when the .NET Email Validation Library first attempts a connection it verifies it is connected to the internet, port 25 is open, and MxRecords can be retrieved. This behavior is on by default. To increase performance when validating a single email address and always connected to the internet, set this property to false.

'Declaration
 
Public Property ConnectionChecking As System.Boolean

'Usage
 
Dim instance As EmailValidation
Dim value As System.Boolean
 
instance.ConnectionChecking = value
 
value = instance.ConnectionChecking

public System.bool ConnectionChecking {get; set;}

public read-write property ConnectionChecking: System.Boolean; 

public function get,set ConnectionChecking : System.boolean

public: __property System.bool get_ConnectionChecking();
public: __property void set_ConnectionChecking( 
   System.bool value
);

public:
property System.bool ConnectionChecking {
   System.bool get();
   void set (    System.bool value);
}