DataGrid get selected rows' column values

I'm trying to get the values of each column of a selected row in a DataGrid. This is what I have:

private void dataGrid1_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
{
    DataGrid dg = sender as DataGrid;
    Console.WriteLine(dg.SelectedCells[0].ToString());
}

But this does not work. If I do a SelectedCells.Count then I get the correct number of columns but I cannot seem to actually get the values of these columns in the selected row. I've tried for quite a while with no luck! Here is my XAML:

<Grid>
    <DataGrid CanUserAddRows="True" AutoGenerateColumns="False" Height="200" HorizontalAlignment="Stretch" Margin="12,12,79,0" Name="dataGrid1" VerticalAlignment="Top" Width="389" DataContext="{Binding}" CanUserResizeColumns="False" CanUserResizeRows="False" HorizontalContentAlignment="Stretch" PreviewMouseDoubleClick="dataGrid1_PreviewMouseDoubleClick" CellEditEnding="dataGrid1_CellEditEnding">
        <DataGrid.Columns>
            <DataGridTextColumn Binding="{Binding  Path=UserID}"
                                Header="User ID" Width="SizeToHeader" />
            <DataGridTextColumn Binding="{Binding  Path=UserName}"
                                Header="User ID" Width="SizeToHeader" />
        </DataGrid.Columns>
    </DataGrid>
</Grid>

I would ideally like to access the data through doing something like rowData.UserID but I cannot seem to work it out. There are lots of tutorials and help for using DataGridView but I'm not using this.

UPDATED

To get the selected rows try:

IList rows = dg.SelectedItems;

You should then be able to get to the column value from a row item.

OR

DataRowView row = (DataRowView)dg.SelectedItems[0];

Then:

row["ColumnName"];

Solution based on Tonys answer:

        DataGrid dg = sender as DataGrid;
        User row = (User)dg.SelectedItems[0];
        Console.WriteLine(row.UserID);