WPF DataGrid Binding Code Behind Problem

[Kevin Marois]

I have a list of objects:

List packs;

Each pack entity has a Caption property and an int Days property on it. I'm trying to bind a data grid in code begind:

dataGrid.Columns.Add(new DataGridTextColumn
{
Header = pack.Caption,
Binding = new Binding("Days")
});

This won't compile with "Cannot create an instance of the abstract class or interface 'Binding'" Every example I find shows it done this way. What's wring here???

If it's not broken, fix it until it is. Everything makes sense in someone's mind. Ya can't fix stupid.