Can I create a DataGrid of an object containing a List<KeyValuePair> in horizontal view?

Question

I have a list of items which I want to present in a datagrid. But each item contains a list of KeyValuePairs which I want to view horizontally. Is there any way?

The object I want to present:

 public class ItemModel
    {
        public string Model { get; set; }

        public List<KeyValuePair<string, int>> DetailsList { get; set; }
    }

My xaml looks like this, but it returns a datagrid with Key and Value as columns instead of Key1, Key2, Key3 etc as columns:

<DataGrid x:Name="PurchaseOrder" CanUserAddRows="False" AutoGenerateColumns="False" CellEditEnding="PurchaseOrder_CellEditEnding">               
                <DataGrid.Columns>
                <DataGridTextColumn Header="Model" Binding="{Binding Path=Model}" />
                   <DataGridTemplateColumn Header="">
                        <DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>
                                <StackPanel Orientation="Horizontal">
                                <DataGrid ItemsSource="{Binding DetailsList}" CanUserAddRows="False" 
                  AutoGenerateColumns="True" CellEditEnding="Models_CellEditEnding">
                                    </DataGrid>
                                </StackPanel>
                            </DataTemplate>
                        </DataGridTemplateColumn.CellTemplate>
                    </DataGridTemplateColumn>
                </DataGrid.Columns>
        </DataGrid>