خطای Can't perform Create, Update, or Delete operations on Table because it has no primary key

[amirmalakie]

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Can't perform Create, Update, or Delete operations on 'Table(Table1)' because it has no primary key.

      private void button1_Click(object sender, EventArgs e)

        {

            var db = new DataClasses1DataContext();

            var q = db.Table1s;

            dataGridView1.DataSource = q;

        }



        private void button2_Click(object sender, EventArgs e)

        {

            DataClasses1DataContext db = new DataClasses1DataContext();

            db.Table1s.InsertOnSubmit(new Table1 { name = textBox1.Text });

            db.SubmitChanges();