Rick,

>1. how do I know which entities in my entitylist have changes?
>I am thinking that the most logical place to insert this code would be in the hookPreSaveEntity or hookPreSaveEntityList methods.
>thoughts and advice are appreciated.

Tim is right--in the current version of MM .NET where there is an underlying DataRow, you can check the DataRows to see if they have changed rather than checking the entity itself.

Best Regards,