Merge two different DataTable columns and bind to a control

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

namespace MergetwoDatatableColumns
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DataSet ds = new DataSet();
            string path = "C:\\XMLFile1.xml";
            //Read XMLFILE1.XML and save it in ds
            ds.ReadXml(path);
            path = "C:\\XMLFile2.xml";
            DataSet ds2 = new DataSet();
            //Read XMLFILE2.XML and save it in ds2
            ds2.ReadXml(path); 
            //Merge datatable from both datasets
            ds.Tables[0].Merge(ds2.Tables[0]);
            //add new column "All Servers"
            ds.Tables[0].Columns.Add("All Servers", typeof(string));
            //Read datatable and fetch all server and dump it into new column "All servers"
            foreach (DataRow dr in ds.Tables[0].Rows)
            {
                dr["All Servers"] = dr["server"].ToString();
            }
            //Read datatable and fetch all servername and dump it into new column "All servers"
            foreach (DataRow dr in ds.Tables[0].Rows)
            {
                //When we merged 2 datatables if there are 3 rows in datatable 1 and 2 in datatable2 
                //now it will become 5rows,So am checking if its blank, then fill it with servername column from datatable2(initial)
                if (dr["All Servers"] == "")
                    dr["All Servers"] = dr["servername"].ToString();
            }
            //Bind the datatable
            comboBox1.DataSource = ds.Tables[0];
            //set displaymember as "All servers", the newly created column.
            comboBox1.DisplayMember = "All Servers";
        }
    }
}