using System;
using System.Reflection; 
using Microsoft.Office.Interop.Excel;

public class CreateExcelWorksheet
{
    static void Main()
    {
        Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();

        if (xlApp == null)
        {
            Console.WriteLine("EXCEL could not be started. Check that your office installation and project references are correct.");
            return;
        }
        xlApp.Visible = true;

        Workbook wb = xlApp.Workbooks.Add(XlWBATemplate.xlWBATWorksheet);
        Worksheet ws = (Worksheet)wb.Worksheets[1];

        if (ws == null)
        {
            Console.WriteLine("Worksheet could not be created. Check that your office installation and project references are correct.");
        }

        // Select the Excel cells, in the range c1 to c7 in the worksheet.
        Range aRange = ws.get_Range("C1", "C7");

        if (aRange == null)
        {
            Console.WriteLine("Could not get a range. Check to be sure you have the correct versions of the office DLLs.");
        }

        // Fill the cells in the C1 to C7 range of the worksheet with the number 6.
        Object[] args = new Object[1];
        args[0] = 6;
        aRange.GetType().InvokeMember("Value", BindingFlags.SetProperty, null, aRange, args);
    
        // Change the cells in the C1 to C7 range of the worksheet to the number 8.
        aRange.Value2 = 8;
    }
}