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I want to display a list of people in a DataGridView in a Windows Forms app. I want my service layer to return a list of Person objects (e.g., IList<Person> ). I want changes in the list to be reflected in the DataGridView and vice versa. My understanding is that using the BindingSource facilitates working with DataGridView . My question is for the two-way databinding to work, do I need: //pseudo code BindingSource.DataSource = IBindingList<Person> or can I do: BindingSource.DataSource = IList<Person> What's the difference? If my make changes to the list will the DataGridView be updated either way? And if I have to use the BindingList , it seems a little wonky (because of creating a dependency) to return a BindingList from my service layer, is there a way around that? Microsoft says of the BindingList (in the Remarks section) http://msdn.microsoft.com/en-us/library/ms132679.aspx : "However, the typical solutions programmer will use a class that provides data binding functionality, such as BindingSource , instead of directly using BindingList<T> ."

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