How to Client Socket that stays connected unless manually close/stop?

i have a client socket c# program and
once it gets connected it will get data to send from queue,
then i have module to do a send and receive transaction.
after this routine the program will look back to the data queue
to process/send again. with this scenario, my client socket should
not be close, meaning it should stay connected from the start
it gets connected to host and will repeatedly looking for queue data
to process.

the client connection will only be closed if it is manually disconnected through a click or command available for user.

the problem is client socket gets hanged once the queue data is empty for some minutes of no transactions.

how can i make this solve, please help me sir SA :)

thanks and sorry for no detailed description...
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