Hi Nicholas !

Thank you for answer.

I have a Web Service on some server machine. Web service waiting for
requests from client machines. Request from client is generating Web Method
with ID - parameter, by this ID Web Service will return byte[] array.

Single byte[] array contains document file, placed on different client
machines too.

Once the web method generated (some client request document ), Web service
checks by ID whose client contain specific document (There is Database table
on server that contain ID, IP of client, full path of the document on the
client ).

From this point I have a problem. I need to tell to the client, which
contain the document,  to send me the file. I wrote some client application
for sending the file to the Web Service by calling some method.

After the document was uploaded, it returns to requested client.

The problem is how can I generate client application from the Server.

Actually, I thought if application will make requests to web service every N
times (seconds) and check if there is a new request. But it's seems me very
bad solution. 1000 clients cannot use internet resource for pings.

What solution can I choose.

Thank you !