The relationship between the two objects cannot be defined because they are attached to different ObjectContext objects.

When using more then one Context, Objects have to be detached before added to another one

Adding Wcf Service Logging

you don't need to change your source code just add to your service web.config:

<system.diagnostics>
<sources>
<source name="System.ServiceModel"
                    switchValue="Information, ActivityTracing"
                    propagateActivity="true">
<listeners>
<add name="traceListener"
type="System.Diagnostics.XmlWriterTraceListener"
initializeData= "C:\Log\wcf.svclog" />
</listeners>
</source>
</sources>
</system.diagnostics>

visual studio or iis: HTTP Error 403.14 - Forbidden The Web server is configured to not list the contents of this directory.

HTTP Error 403.14 - Forbidden

The Web server is configured to not list the contents of this directory.

solution: add  <directoryBrowse enabled="true" /> for root path:

  <location path=".">
    <system.webServer>
      <directoryBrowse enabled="true" />
    </system.webServer>
  </location>

Disk / Drive / Partition Image software

Norton Ghost:
takes long to install, installer often opens command prompt and interrupts you, complicated gui, can' t read Linux partitions

DriveImageXML: can`t read Linux partitions

Acronis2016: can read Linux partitions, very comfortable gui, but I tried to use test version to make backup didn't work

Partition Image: is a dos tool, doesn't work under windows 10 (first attemp, no time for second try)

compare andronoid - windows 10 phone

I had a Samsung S3 neo and switched to Lumia 640.

summary: windows phone 10 has fewer apps than andronoid, but those apps are more stable and faster than andronoid

Writing is faster and reliabler on Windows 10 phone than on the andronoid system.

Navigation: on Lumia there is the here navigation installed, which has offline maps and speed warning, but I didn't find the traffic jam visualisation like google maps.

Energy: the Lumia Akku endures longer then the Samsung, I think windows phone 10 is more power saving

Continous Integration Build with visualstudio online: No queue was specified in the build request.

if you get error        

No queue was specified in the build request.

set

General Tab -> Default agent queue = Hosted


to set up new CI build:
Go to Build Menu of your project
create new Build definition by pressing +
General Tab -> Default agent queue = Hosted