void button1_Click(object sender, EventArgs e)
{
Student obj = new Student();
obj.ID = int.Parse(textBox1.Text);
obj.StudentName = textBox2.Text;
StudentDataAccess da = new StudentDataAccess();
da.InsertData(obj);
}
void StudentListForm_Load(object sender, EventArgs e)
{
StudentDataAccess da = new StudentDataAccess();
dataGridView1.DataSource = da.GetData();
}