public void CaseDelete()
{
// Arrange
var model = _appDataContext.Models <PainChain>()
.FirstOrDefault(x => x.LeadId == new Guid("e579254e-6061-4b0e-b3f8-5c421e3283b2"));
var trackerBeforeSave = _appDataContext.ChangeTracker.GetTrackedModel(model);
Assert.IsNotNull(trackerBeforeSave);
Assert.AreSame(model, trackerBeforeSave.Model);
Assert.AreEqual(ModelState.Unchanged, trackerBeforeSave.GetStatus());
// Act
_appDataContext.DeleteModel(model);
_appDataContext.Save();
// Assert
var trackerAfterSave = _appDataContext.ChangeTracker.GetTrackedModel(model);
Assert.IsNull(trackerAfterSave);
Assert.IsTrue(model.IsMarkAsDeleted);
}