// テンプレート出力で利用するデータクラス
public class A
{
	public String Name { get; set; }
	pulibc int Num { get; set; }
	public DateTime Date { get; set; }
}

// "FPTemplate.xls" を読み込んで "out.xls" を出力するサンプル。
// データ作成
IDictionary<string, object> data = new IDictionary<string, object>();
data["title"] = "タイトルである";
IList<A> aList = new List<A>()
{
	new A() { Name = "1行目", Num = 10, Date = DateTime.Now },
	new A() { Name = "2行目", Num = 20, Date = DateTime.Now },
	new A() { Name = "3行目", Num = 30, Date = DateTime.Now },
	new A() { Name = "4行目", Num = 10, Date = DateTime.Now },
	new A() { Name = "5行目", Num = 20, Date = DateTime.Now },
	new A() { Name = "6行目", Num = 30, Date = DateTime.Now },
};
data["b"] = aList;

HSSFWorkbook wb = null;
FPTemplate template = new FPTemplate();
using (Stream s = new FileStream("FPTemplate.xls", FileMode.Open, FileAccess.Read))
{
	wb = template.Process(s, data);
}
using (Stream fos = new FileOutputStream("out.xls"))
{
	wb.Write(fos);
}