Add data to existing datatable from client supplied dynamic data

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C#

Hi I have been trying to add data from a textbox into a datatable called Registration on button click. The column I am trying to add the data to is "Name". However, when I click button, it gives me error saying the text I entered in textbox1 (whatever I entered into the textbox) column does not exist. I want to maintain the same logic in the code. Any help would be appreciated.

protected void Button1_Click(object sender, EventArgs e)
   {
       SqlConnection con = new SqlConnection();
       con.ConnectionString = "MY CONNECTION STRING GOES HERE";
       con.Open();
       SqlCommand cmd = new SqlCommand();
       cmd.CommandText = "insert into Registration (Name) values (" +    Convert.ToString(TextBox2.Text) + ")";
       cmd.CommandType = CommandType.Text;
       cmd.Connection = con;
       //cmd.ExecuteNonQuery();
       DataSet ds = new DataSet();
       SqlDataAdapter da = new SqlDataAdapter(cmd);
       da.Fill(ds);
       con.Close();
   }