如何删除csv表格中的重复行

namespace ConsoleApplication4
{
    class Program
    {
        static string path = @"C:\Users\鸣\Desktop\1111.csv";
        static void Main(string[] args)
        {
            
            if (File.Exists(path))
            {
                File.Delete(path);
                GenerateFIle();
            }
            List<string[]> content = new List<string[]>();

            ReadFile(content);
            int count = 0;
            foreach (var line in content)
            {
                count++;
                Console.WriteLine(line[0]+','+line[1]+"count:"+count);
            }
            Console.ReadKey();
               

           
            
        }

        private static void ReadFile(List<string[]> content)
        {
            using (StreamReader sr = new StreamReader(path))
            {
                while (true)
                {
                    var line = sr.ReadLine();
                    if (line == null)
                        break;
                    string[] words = line.Split(',');
                    List<string> firstline = content.Select(p => p[0]).ToList();
                    if (!firstline.Contains(words[0]))
                    {
                        content.Add(words);
                    }
                }
            }
        }

        private static void GenerateFIle()
        {
            using (StreamWriter sw = new StreamWriter(path))
            {
                var count = 0;
                Random rnd = new Random();
                for (var i = 0; i < 100; i++)
                {
                    count++;
                    sw.WriteLine(count + "," + rnd.Next(1, 100));
                }
                count = 0;
                for (var i = 0; i < 100; i++)
                {
                    count++;
                    sw.WriteLine(count + "," + rnd.Next(1, 100));
                }
            }
        }

        
    }
}