The underlying connection was closed the connection was closed unexpectedly?

hello guys how r u all ??

my question is that, i have a created a wcf service connected to my winform application and i am retrieving table entity from wcf service  but i get the error " the underlying connection was closed the connection was closed unexpectedly. "  what does it mean and when this error occur kindly tell me  and help me ??


i searched out on internet lots of time but i did not find suitable answer


Reply soon


Thanks