class TestApp {
    static void Main(string[] args) {
        Workbook book = new Workbook();
        Worksheet sheet = book.Worksheets.Add("Sample");
        WorksheetRow row =  sheet.Table.Rows.Add();
        row.Cells.Add("Hello World");
        book.Save(@"c:\test.xls");
    }
}

Class TestApp 
    Public Shared Sub Main(byval args() as string) 
        Dim book = new Workbook()
        Dim sheet as Worksheet = book.Worksheets.Add("Sample")
        row as WorksheetRow =  sheet.Table.Rows.Add()
        row.Cells.Add("Hello World")
        book.Save(@"c:\test.xls")
    End Sub
End Class