Receiving the data from gprs as �. Please help to solve this.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net.WebSockets;
using System.Net.Sockets;
using System.Net;
using System.Text;
using System.Threading.Tasks;



namespace TCP_IP_Client
{
    public partial class client : System.Web.UI.Page
    {
        System.Net.Sockets.TcpClient clientsocket = new System.Net.Sockets.TcpClient();
        
        protected void Page_Load(object sender, EventArgs e)
        {
            clientsocket.Connect("59.92.111.69", 8080);
            Label1.Text = "Server connected";
            
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            NetworkStream serverStream = clientsocket.GetStream();
           // byte[] outStream = System.Text.Encoding.ASCII.GetBytes(TextBox2.Text + "$");
            //serverStream.Write(outStream, 0, outStream.Length);
            //serverStream.Flush();
            byte[] inStream = new byte[10025];
            serverStream.Read(inStream, 0, (int)clientsocket.ReceiveBufferSize);
            Response.Write(clientsocket.ReceiveBufferSize);
            string returndata = System.Text.Encoding.UTF7.GetString(inStream);
            //string returndata = System.Text.Encoding.UTF32.GetString(inStream);
            //s.Length.ToString();
            msg(returndata);
            TextBox2.Text = "";
            TextBox2.Focus();
            
            
        }
        public void msg(string mesg)
        {
            
            TextBox1.Text = Environment.NewLine + " and " + mesg;

        } 
    }
}