linq - How to create an XML declaration for a document

LINQ to XML - How to create an XML declaration for a document - Using XDocument XDeclaration
CreateXMLDeclaration.aspx 

<%@ Page Language="C#" AutoEventWireup="true" %>
<%@ Import Namespace="System.Linq" %>
<%@ Import Namespace="System.Xml.Linq" %>

<!DOCTYPE html>
<script runat="server">
    protected void Button1_Click(object sender, System.EventArgs e)
    {
        XDocument myDoc = new XDocument
        (
            new XDeclaration("1.0","utf-8","yes"),
            new XElement("Root","root contents")
        );

        Literal1.Text = myDoc.Declaration.ToString();
        Literal2.Text = myDoc.ToString();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>LINQ to XML - How to create an XML declaration for a document - Using XDocument XDeclaration</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:DarkBlue; font-style:italic;">
            LINQ to XML - How to create an XML declaration for a document
            <br />Using XDocument XDeclaration
        </h2>
        <hr width="600" align="left" color="CornFlowerBlue" />
        <asp:Literal
             ID="Literal1"
             runat="server"
             Mode="Encode"
             >
        </asp:Literal>
        <br />
        <asp:Literal
             ID="Literal2"
             runat="server"
             Mode="Encode"
             >
        </asp:Literal>
        <br /><br />
        <asp:Button 
            ID="Button1"
            runat="server"
            OnClick="Button1_Click"
            Text="Create an XML declaration"
            Height="45"
            Font-Bold="true"
            ForeColor="DodgerBlue"
            />
    </div>
    </form>
</body>
</html>
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