Access Sharepoint Lists

gistfile1.txt

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Security;
using System.Text;
using System.Threading.Tasks;
using Microsoft.SharePoint.Client;
using Microsoft.Office.Interop;
using Excel = Microsoft.Office.Interop.Excel;
using Microsoft.Office.Interop.Excel;
using SP = Microsoft.SharePoint.Client;

namespace ExcelExport
{
    class Program
    {
        static void openfile()
        {
            string mysheet = @"C:\Users\Ashikp\Desktop\ExceltoSp.xlsx";
            var excelApp = new Excel.Application();
            excelApp.Visible = true;

            Excel.Workbooks books = excelApp.Workbooks;
            Excel.Worksheet sheet = books.Open(mysheet).Sheets[1];            
            
            Range xlRange = sheet.UsedRange;            
            int rows = 2;
            int rowCount = xlRange.Rows.Count;
            int cols = xlRange.Columns.Count;

            object[] toExportDetails = new object[95];
            int counter = 0;
            for (int row = 2; row <= rowCount; row++)
            {
                for (int col = 1; col <= cols; col++)
                {
                    //Console.WriteLine(" Col {0} => Value: {1}", col, xlRange.Cells[rows, col].Value2);
                    toExportDetails[counter++] = xlRange.Cells[rows, col].Value2;
                }
            }                
            
            books.Close();
            System.Runtime.InteropServices.Marshal.FinalReleaseComObject(books);
            System.Runtime.InteropServices.Marshal.FinalReleaseComObject(excelApp);
        }

        static void Main(string[] args)
        {
            ClientContext clientContext = new
                ClientContext("https://rlecoin.sharepoint.com/sites/MEAppraisalsDev/");
            string text = System.IO.File.ReadAllText(@"C:\Ashik\ExportToSharepoint\Blah.txt");
                      
            var secureString = new SecureString();
            foreach (char c in text)
            {
                secureString.AppendChar(c);
            }
            clientContext.Credentials = new SharePointOnlineCredentials("ashik.paul@rle.co.in", secureString);           

            SP.List EmpoList = clientContext.Web.Lists.GetByTitle("Employees");
            SP.List ProjectsoList = clientContext.Web.Lists.GetByTitle("Projects");

            ListItemCreationInformation itemCreateInfo = new ListItemCreationInformation();
            ListItem oListItem = EmpoList.AddItem(itemCreateInfo);
            oListItem["Title"] = "My New Item!";            

            oListItem.Update();
            clientContext.ExecuteQuery();

            /*foreach (ListItem oListItem in collListItem)
            {
                Console.WriteLine("ID: {0} \tTitle: {1}\t Employee Name: {2}",
                    oListItem.Id, oListItem["Title"], oListItem["Employee"]);
            }*/
            openfile();
            Console.ReadLine();
        }
    }
}