An object that represents the data source from which the grid retrieves its data.
The grid cannot operate without a data source. It can be bound to data from a database, from an XML file or to any data created at runtime. The grid can be bound to any object that implements the IEnumerable interface or its descendant (e.g. IList, ICollection). To bind a grid, you should assign a data source to the ItemsSource property. Note that the grid cannot be bound at design-time - only at runtime.