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copied!<p>Ah, so there could be multiple models which have been modified and might need the DateTime set on save.</p> <p>In which case either push the boolean flags (setDt1 and SetDt2) into the model and when you make changes add those models to a list... or add a Tuple of <code><model,bool,bool></code> to a list.</p> <p>Look at this question <a href="https://stackoverflow.com/questions/3265257/getting-all-changes-made-to-an-object-in-the-entity-framework">Getting all changes made to an object in the Entity Framework</a> to see an example of then looping over those stored models to view their modified properties.</p> <p>You can check an entity's <a href="http://msdn.microsoft.com/en-us/library/system.data.entitystate.aspx" rel="nofollow noreferrer">EntityState</a> to get Entities that have been added with </p> <pre><code>var addedStateEntries = Context.ObjectStateManager.GetObjectStateEntries(EntityState.Added); </code></pre> <p>and entities that have been modified with </p> <pre><code>var modifiedStateEntries = Context.ObjectStateManager.GetObjectStateEntries(EntityState.Modified); </code></pre> <p>You can loop over them when you're ready to save and set dt1 or dt2 as appropriate </p> <hr> <p>If I understand correctly then you want dt1 and dt2 to be set to <code>DateTime.Now</code> when you <code>saveChanges()</code></p> <p>In that scenario replace your call to <code>context.SaveChanges()</code> with a call to the below method</p> <pre><code>private void SaveModel(SomeEntities context, SomeModel model bool setDt1, bool setDt2) { DateTime instant = DateTime.Now; if (SetDt1) { model.dt1 = instant; } if (setDt2) { model.dt2 = instant; } context.SaveChanges(); } </code></pre> <hr> <p>So looking at the more complex example... I'd set a flag once I know if the date should be set on save. I've left <code>SavingDateTimeNow()</code> in place as I don't know if it does other tasks as well as setting dt1 to Now</p> <pre><code>var context = new SomeEntities(); SomeModel model = context.GetSomeModel(...); var setDt1 = false; var setDt2 = false; // SomeModel has two DateTime fields: dt1 and dt2 if(someComplexCondition) { model.dt1 = SavingDateTimeNow(); // .... 13:42:00 setDt1 = true; } // some code from which I would know if someOtherComplexCondition is true if(someOtherComplexCondition) { model.dt2 = SavingDateTimeNow(); // .... 13:42:10 setDt2 = true; } // again 10s. code // much more code here SaveModel(context, model, setDt1, setDt2); // .... 13:42:20 </code></pre>

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