Implement WebClient in ASP.Net using VB.Net

How to convert Sample Code to ASP.Net Vb.Net Web Forms

using System;
using System.Collections.Specialized;
using System.Net;

using (WebClient client = new WebClient())
{
    byte[] response = client.UploadValues("https://semaphore.co/api/v4/messages", new NameValueCollection()
    {

        { "apikey", "" },
        { "number", "09998887777" },
        { "message", "I just sent my first message with Semaphore" },
        { "sendername", "SEMAPHORE" },
    });
    string result = System.Text.Encoding.UTF8.GetString(response);
}