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

If you are using dbml instead of edmx you will get this( The underlying connection was closed: The connection was closed unexpectedly.) as dbml will not return serialisable data it needs datacontract so go to properties of dbml file and change the Serialization mode to unidirectional.