:master: non so. Basta fare un semplice esempio per vedere che va

pagina
codice:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="prova.aspx.cs" Inherits="prove_prova" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
        <hr />
        <asp:LinkButton ID="LinkButton1" runat="server" onclick="modificaLabel">Modifica label</asp:LinkButton>
    </div>
    </form>
</body>
</html>
codice
codice:
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

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

    }
    protected void modificaLabel(object sender, EventArgs e)
    {
        this.Label1.Text = "Label modificata";
    }
}