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get meta tag c#

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{

Response.Write(GetMeta());

}
</script>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
</body>
</html>

//copy into Default.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;
using System.Web.Script.Serialization;
using System.Text.RegularExpressions;
using HtmlAgilityPack;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
[WebMethod]
public static string GetMeta()
{

using (var webClient = new System.Net.WebClient()){
var data = webClient.DownloadString("https://net-raft.com");

string tempSrc = data.Replace("<div", "|<div");
tempSrc = tempSrc.Replace(tempSrc, " ");
tempSrc = tempSrc.Trim();

var doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(tempSrc.Replace("<", " <"));

var metaTags = doc.DocumentNode.SelectNodes("//meta");

if (metaTags != null)
{
foreach (var tag in metaTags)
{
if (tag.Attributes["property"] == "og:description")
{
string temp = tag.Attributes["content"].Value;
if (temp == null) temp = tag.Attributes["Content"].Value;
return temp;
}
}
}

}
}
}