title: Visual Studio 2010 Debugger problem - unregistered Error?
body: <p>I'm having some problems with Visual Studio 2010's <strong>debugger</strong> when using the unit-test debugging mode.</p>
  
  <p>When ever I hit a breakpoint in a test all the object data is replaced with question marks and it tells me "Child could not be evaluated". Shortly after, it will <strong>abort</strong> debugging-mode by it self and ignore any futher break points. 
  There is not shown any error, but under summary you can read:</p>
  
  <p><strong>Test host process exited unexpectedly.</strong></p>
  
  <p>I can't find any useful information about this error.</p>
  
  <p>There is no problem debugging outside the test or when stepping through (/stepping into) the test. If I place a breakpoint for every line, it will show me the data most of the times. 
  If there is not a breakpoint for EVERY line that is connected to modification of the object the test will abort.</p>
  
  <p>The data has been shown earlier without problem, and yes all references are available and up to date.</p>
  
  <p><em>Have anybody experienced a simular problem? ... And hopefully found a solution?</em></p>
  
  <p><strong>This is what I've tried so far:</strong></p>
  
  <ul>
  <li>Rebuildning and cleaning the solution.</li>
  <li>closing visual studio + reboot system</li>
  <li>installed VS10 Service Pack 1</li>
  <li>reinstalled Visual Studio 10</li>
  <li>tested on VS10 Ultimate and Premium</li>
  <li>Removing and regenerating solutions files</li>
  <li>Removing all break points</li>
  <li>TraceAndTestImpact/Local.testsettings: Test Timeout > timeout and abort set to 30 minuts.</li>
  <li>TraceAndTestImpact/Local.testsettings: Unit Test >assemblie folders defined </li>
  <li>TraceAndTestImpact/Local.testsettings: Deployment > Enable deplyment - directories and files</li>
  </ul>
  
  <p><strong>System information</strong>
  Windows 7 Ultimate 64-bit</p>
  
  <p><strong>Additional information:</strong></p>
  
  <ul>
  <li>When stepping through the code, the data is visible.</li>
  <li>The tests I'm running is NOT failing. If no breakpoint are sat they passes.</li>
  <li>If I place the breakpoint earlier in the the code, the test just aborts there.</li>
  <li>The only visible runtime object information is the count and it's displayed like this: "Count = 0x00000001"</li>
  <li>Additional to this problem, the debugger is generally "bugging". When I remove break points they come back! Some break points are invisible until the time of debugging. Breakpoints placed before the problem started can't be removed and is still working fine.</li>
  </ul>
  
  <p><strong>ANY suggestions are more then welcome.</strong> I have no idea what to try next.</p>
  
  <p>Thanks for your time :)</p>