Question

I am new to WCF. Is the client connected when the service is instantiated

 SampleService client = new SampleService();

Or does it connect and disconnect when a method is called on the client?

client.sampleMethod();

I want to connect to the client and send multiple messages across the same connection. Is this possible?

Answer 1

To answer your second question: the connection is kept open by default.

For the first, and as an clarification to above statement: it depends on the binding. For starters, there is no Connect() method in ClientBase<TChannel> (which a WCF proxy client inherits from), so there’ll be no use calling it since that’ll throw a compiler error.

A connection to the service is made upon the first call to the service; the constructor does nothing more than bring the client object in a usable state, it does not connect to the service.