TextBox и ComboBox

       DataTable table;
        private void Form1_Load(object sender, EventArgs e)
        {
            table = new DataTable();
            table.Columns.Add("ID", typeof(int));
            table.Columns.Add("Name", typeof(string));
            table.Rows.Add(1, "ВАСЯ");
            table.Rows.Add(2, "ПЕТЯ");
            table.Rows.Add(3, "ЖЕНЯ");
 
            comboBox1.DataSource = table;
            comboBox1.DisplayMember = "Name";
            comboBox1.ValueMember = "ID";
        }
        private void TextBox1_TextChanged(object sender, EventArgs e)
        {
           if(textBox1.TextLength != 0)
              comboBox1.SelectedValue = int.Parse(textBox1.Text);
        }

 private void Form2_Load(object sender, EventArgs e)
      {
            // TODO: This line of code loads data into the 'sEMDataSet.Kurs' table. You can move, or remove it, as needed.
            this.kursTableAdapter.Fill(this.sEMDataSet.Kurs);
            // TODO: This line of code loads data into the 'sEMDataSet.Uchenik' table. You can move, or remove it, as needed.
            this.uchenikTableAdapter.Fill(this.sEMDataSet.Uchenik);
           comboBox1.DataSource = this.sEMDataSet.Kurs;
}