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How to find out which object is inside the ObjectStateManager more than once

Hi i am getting the following error:

AcceptChanges cannot continue because the value of the object conflicts with another object in the ObjectStateManager. Make sure the key values ​​are unique before calling AcceptChanges.

Now I'm trying to fix this, but I need to figure out exactly which entity is giving me problems, so I know where to look.

I know what the error is and I know how to solve it, but I don't know how to find out which object is double.

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You can check ObjectStateManager to get all changed objects. the code looks something like this:



var lst = context.ObjectStateManager
              .GetObjectStateEntries(EntityState.Added |
                                     EntityState.Modified | 
                                     EntityState.Deleted);
var res = lst.GroupBy(c => c.EntityKey).Where(c=> c.Count() > 1);
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