Bindable data source with arbitary number of columns

I need to display data with a fixed number of rows and a user changeable number of columns (time series of data). I'm not sure what type I should use as a data source. A 2d array is po开发者_如何学编程ssible, but I'd prefer something fully supported by .NET Framework.

How about datatable. I think that is more flexible when your columns are changing and rows are going to be same.