You can extract all the information from the DbEntityValidationException with the following code (you need to add the namespaces: System.Data.Entity.Validation and System.Diagnostics to your using list):

catch (DbEntityValidationException dbEx){    foreach (var validationErrors in dbEx.EntityValidationErrors)    {        foreach (var validationError in validationErrors.ValidationErrors)        {            Trace.TraceInformation("Property: {0} Error: {1}",                                     validationError.PropertyName,                                     validationError.ErrorMessage);        }    }}