public SampleDataSource()
{
    String ITEM_CONTENT = String.Format("Item Content: {0}\n\n{0}\n\n{0}\n\n{0}\n\n{0}\n\n{0}\n\n{0}",
                "Curabitur class …中略…");

    var group1 = new SampleDataGroup("Group-1",
            "Group Title: 1",
            "Group Subtitle: 1",
            "Assets/DarkGray.png",
            "Group Description: Lorem ipsum …中略… ante a ante");
    group1.Items.Add(new SampleDataItem("Group-1-Item-1",
            "Item Title: 1",
            "Item Subtitle: 1",
            "Assets/LightGray.png",
            "Item Description: Pellentesque porta …中略… ac erat.",
            ITEM_CONTENT,
            group1));

// 中略

    this.AllGroups.Add(group1);

// 後略