Retrieve TFS Test Steps always returns count of 0

Question

I am trying to retrieve test steps (aka "actions") that have been added to a test case in TFS (2017.2) using the API (Microsoft.TeamFoundationServer.ExtendedClient v15.112.1). My current implementation always returns 0 test steps, although the actual test case has steps. I tried this as well in a clean new Team Project without any Work Item customization and even there it returns 0 steps. My implementation uses the older API (based on SOAP webservices), because it seems the newer http based API does not yet implement test steps. This is the code I have used:

private void GetTestStepsForTestCase(int testCaseId, int testSuiteId, 
string teamProjectName, Uri tfsUrl)
{
   TfsTeamProjectCollection tpc = new TfsTeamProjectCollection(tfsUrl);
   ITestManagementService itms = tpc.GetService<ITestManagementService>();
   ITestManagementTeamProject ittp = itms.GetTeamProject(teamProjectName);
   ITestSuiteBase suite = ittp.TestSuites.Find(testSuiteId);
   ITestCaseCollection testCaseCollection = suite.AllTestCases;
   ITestCase itestCase = testCaseCollection.FirstOrDefault(t => t.Id == testCaseId);

   foreach (Microsoft.TeamFoundation.TestManagement.Client.ITestAction itestAction in itestCase.Actions)
   {
      // Do something
   }
}

Anyone?

Answer 1

OK, I finally figured out this one myself. The answer and comments of Andy helped me validate that my code is correct. I just discovered that my code worked fine when NOT debugging! When debugging, at some point I noticed this:

So probably because of lazy loading somewhere, it is not possible to verify the count of the attachments debug-time (see post here: Lazy<T>: "The function evaluation requires all threads to run").