C# WFA Grid Cell If Contains Then Set Color

main.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

namespace TestaWFA
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        List<int> tablo1 = new List<int> { 444, 201 };
        List<int> tablo2 = new List<int> { 101, 423 };

        private void Form1_Load(object sender, EventArgs e)
        {
            dataGridView1.DataSource = LoadCollectionData();

            for (int i = 0; i < dataGridView1.RowCount; i++)
            {
                if (dataGridView1.Rows[i].Cells.Count > 0)
                {
                    if (!string.IsNullOrWhiteSpace(dataGridView1.Rows[i].Cells[0].Value.ToString()) && tablo1.Contains(Convert.ToInt32(dataGridView1.Rows[i].Cells[0].Value)))
                    {
                        dataGridView1.Rows[i].Cells[1].Style.BackColor = Color.LawnGreen;
                    }
                    else if (!string.IsNullOrWhiteSpace(dataGridView1.Rows[i].Cells[0].Value.ToString()) && tablo2.Contains(Convert.ToInt32(dataGridView1.Rows[i].Cells[0].Value)))
                    {
                        dataGridView1.Rows[i].Cells[1].Style.BackColor = Color.OrangeRed;
                    }
                }
            }
        }

        private List<Author> LoadCollectionData()
        {
            List<Author> authors = new List<Author>
            {
                new Author()
                {
                    ID = 101,
                    Name = "Mahesh Chand",
                    BookTitle = "Graphics Programming with GDI+",
                    DOB = new DateTime(1975, 2, 23),
                    IsMVP = false
                },

                new Author()
                {
                    ID = 201,
                    Name = "Mike Gold",
                    BookTitle = "Programming C#",
                    DOB = new DateTime(1982, 4, 12),
                    IsMVP = true
                },

                new Author()
                {
                    ID = 244,
                    Name = "Mathew Cochran",
                    BookTitle = "LINQ in Vista",
                    DOB = new DateTime(1985, 9, 11),
                    IsMVP = true
                },

                new Author()
                {
                    ID = 423,
                    Name = "Mathew Cochran",
                    BookTitle = "LINQ in Vista",
                    DOB = new DateTime(1985, 9, 11),
                    IsMVP = true
                },

                new Author()
                {
                    ID = 111,
                    Name = "Mathew Cochran",
                    BookTitle = "LINQ in Vista",
                    DOB = new DateTime(1985, 9, 11),
                    IsMVP = true
                },

                new Author()
                {
                    ID = 344,
                    Name = "Mathew Cochran",
                    BookTitle = "LINQ in Vista",
                    DOB = new DateTime(1985, 9, 11),
                    IsMVP = true
                },

                new Author()
                {
                    ID = 444,
                    Name = "Mathew Cochran",
                    BookTitle = "LINQ in Vista",
                    DOB = new DateTime(1985, 9, 11),
                    IsMVP = true
                }
            };

            return authors;
        }
    }

    public class Author
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public DateTime DOB { get; set; }
        public string BookTitle { get; set; }
        public bool IsMVP { get; set; }
    }
}