C#

  foreach (DataGridViewRow row in this.dataGridView1.Rows)
            {
                int R1 = row.Index;
for (b = 0; b < dataGridView2.ColumnCount; b++)
                    {
                        a = 0;
                        for (c = 0; c < dataGridView2.RowCount; c++)
                        {
                            Ans_Grid.Rows[R1].Cells[b].Value =
                                 (((Double.Parse(dataGridView1.Rows[R1].Cells[c].Value.ToString()))
                                * (Double.Parse(dataGridView2.Rows[c].Cells[b].Value.ToString())))).ToString()
;
Ans_Grid.Rows[R1].Cells[b].Value = a + Convert.ToInt16(Ans_Grid.Rows[R1].Cells[b].Value);
                             a = Convert.ToDouble(Ans_Grid.Rows[R1].Cells[b].Value);

<pre>/* I am getting an invalid argument error in my for loop and I don't understand why */
using System;
using System.IO;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Boolean;

namespace Applica
{
    class Program
    {
        static void Main(string[] args)
        {
            DirectoryInfo da = new DirectoryInfo("C:\\Folder9");
            FileInfo[] Arr = da.GetFiles();
            FileInfo ap = Arr[Arr.Length - 1];
            long Totbyte = ap.Length;
            string filePath = ap.FullName;
            string temPath = Path.GetTempFileName();
            byte[] data = File.ReadAllBytes(filePath);
            File.WriteAllBytes(temPath, data);            
            byte[] dataB = new byte[1];
            BitArray bits = new BitArray(dataB);
            for (uint counter = 0; counter < Totbyte; counter++)
            {
                dataB[0] = data[counter];
                for (uint count = 0; count < bits.Length; count++)
                {
                    if (bits[count] == 0)
                        Console.Write(bits[count] ? "1" : "0");
                }
            }
        }
    }
}