winform删除dataGridView列报异常：System.IndexOutOfRangeException:“索引 7 没有值

winform界面如下：

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;

 namespace form1
 {
     public partial class Form1 : Form
     {
         List<Student> data = GetStudents();
         public Form1()
         {
             InitializeComponent();

             this.dataGridView1.DataSource = data;
         }

         public static List<Student> GetStudents()
         {

             return new List<Student>()
             {
                 new Student{ ID =,Name="小a",Age=},
                 new Student{ ID =,Name="小b",Age=},
                 new Student{ ID =,Name="小c",Age=},
                 new Student{ ID =,Name="小d",Age=},
                 new Student{ ID =,Name="小e",Age=},
                 new Student{ ID =,Name="小f",Age=},
                 new Student{ ID =,Name="小g",Age=},
                 new Student{ ID =,Name="小k",Age=}

             };

         }
         private void tsmDelete_Click(object sender, EventArgs e)
         {

             List<Student> students = new List<Student>();
             foreach (DataGridViewRow row in this.dataGridView1.SelectedRows)
             {
                 var student = row.DataBoundItem as Student;
                 if (student != null)
                 {
                      data.Remove(student);
                    // students.Add(student);
                 }
             }

             for (int i = ; i < students.Count(); i++)
             {
                 data.Remove(students[i]);
             }
             this.dataGridView1.DataSource = null;
             this.dataGridView1.DataSource = data;
         }
     }
 }

问题说明：右键删除行的时候异常，System.IndexOutOfRangeException:“索引 7 没有值。

删除的代码如下：

 private void tsmDelete_Click(object sender, EventArgs e)
        {

            foreach (DataGridViewRow row in this.dataGridView1.SelectedRows)
            {
                var student = row.DataBoundItem as Student;
                if (student != null)
                {
                     data.Remove(student);
                }
            }
            this.dataGridView1.DataSource = null;
            this.dataGridView1.DataSource = data;
        }

修改后的代码：

        private void tsmDelete_Click(object sender, EventArgs e)
        {

            List<Student> students = new List<Student>();
            foreach (DataGridViewRow row in this.dataGridView1.SelectedRows)
            {
                var student = row.DataBoundItem as Student;
                if (student != null)
                {
                students.Add(student);
                }
            }

            for (int i = 0; i < students.Count(); i++)
            {
                data.Remove(students[i]);
            }
            this.dataGridView1.DataSource = null;
            this.dataGridView1.DataSource = data;
        }

异常的原因分析：

this.dataGridView1.SelectedRows获取选中的行，假设删除的是第7行和第8行。

遍历去取删除这两行，类型DataGridViewRow 直接引用数据源中的值。第7行删除以后总行数就变成了7行 row.DataBoundItem去根据索引取第8行的值就超出了索引。