Index was outside the bounds of the array. C#

protected void btnCSV_Click(object sender, EventArgs e)
        {

            string filePath = "D:\\users3.txt";
            string line;

            //if (File.Exists(filePath))
            //{
                StreamReader file = null;
                
                try
                {
                    file = new StreamReader(filePath);  //LOCAL

                    while ((line = file.ReadLine()) != null)
                    {
                        string Firstname = line.Split(',')[0];
                        string Lastname = line.Split(',')[1];
                        string Date = line.Split(',')[2];
                        string ActiveCode = "A";

                        DataSet dsInsert = new DataSet();
                        SqlDataAdapter daInsert = new SqlDataAdapter("EXECUTE usersInsert '" + Firstname  + "','" + Lastname + "','" + Date + "','" + ActiveCode + "'", System.Configuration.ConfigurationManager.ConnectionStrings["myConnectionString"].ConnectionString);
                        daInsert.Fill(dsInsert);

                        lblFuDocInAB.Text = "Successfully added new user!";
                        //lblFuDocInAB.Text = daInsert.SelectCommand.CommandText.ToString();
                    }
                }
                catch (Exception ex)
                {
                    if (file != null)
                        file.Close();

                        lblFuDocInAB.Text = ex.Message.ToString();

                }

                System.IO.File.Delete(Request.PhysicalApplicationPath + filePath);
            //}
    }

I successfull added users in my db,but get  Index was outside the bounds of the array. C#

any solution?