Ax2012 Get Table Field Names , Labels using MetaDataService

Before writing this code please take the reference of the service
net.tcp://localhost:8101/DynamicsAx/Services/MetadataService

I have create the windows project with two textboxes,txtTableName,txtFieldsList in the form.

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;
using Krishh_GetTableFieldLabels.MetadataServiceReference;

namespace Krishh_GetTableFieldLabels
{
    public partial class GetTableFieldswithLabels : Form
    {
        public GetTableFieldswithLabels()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            AxMetadataServiceClient client = new AxMetadataServiceClient();
            try
            {
                string[] tablenames = new string[1];
                tablenames[0] = txtTableName.Text;

                // Gets the table metadata.
                TableMetadata[] tableMetadata = client.GetTableMetadataByName(tablenames);
                TableMetadata tableMetadata1 = tableMetadata[0];

                foreach (DataFieldMetadata fieldMetadata in tableMetadata1.Fields)
                {
                    txtFieldsList.Text += fieldMetadata.Name + "," + client.GetLabelMetadataForLanguageById("EN-US", new string[] { fieldMetadata.LabelId })[0].LabelString + Environment.NewLine;
                }
             
                client.Close();
            }
            catch
            {
                client.Abort();
                throw;
            }
        }
    }
}