You should be able to do so by using the ItemsSource property of the grid and referencing your collection (probably located in your view model), like this:

ItemsSource="{Binding Path=DownloadsCollection}" 

Then add a binding on your columns to show the info (properties) of your MyClass objects in the collection.

For a more detailed tutorial on how to do it, check this link.

You should be able to do so by using the ItemsSource property of the grid and referencing your collection (probably located in your view model), like this:

ItemsSource="{Binding Path=DownloadsCollection}" 

Then add a binding on your columns to show the info (properties) of your MyClass objects in the collection.

For a more detailed tutorial on how to do it, check this link.

Edit:

You can simply try something like this to see if everything works right and then move to custom columns:

<DataGrid ItemsSource="{Binding DownloadsCollection}" />