The underlying connection was closed: The connection was closed unexpectedly

Question

This exception is consistently thrown on a SOAP Request which takes almost three minutes to receive and is 2.25 megs in size.

When scouring the web I find all sorts

Answer 1

I've got the same issue, and after deep investigations I found this article:

Merrick Chaffer's Blog

It was all related to setting the "dataContractSerializer" for both client and server. Hope this to be helpful.