method hashcode changes

Sep 20, 2015 at 3:50 AM
Edited Sep 20, 2015 at 4:11 AM
I have a service method which changes its hashcode.

byte[] GetBuffer() // always returns 171 bytes

which works until the hashcode for the client method changes for some reason. ( in Channel.InvokeMethod)
The methodmaps havent changed...just the call's hashcode.
It is finding the correct method from the stack.
I am using x64 and have tried .net 2, 4, 4.5, 4.6.