1.

protected override void InitializeCulture()
    {
        string _culture = “th-TH“;
        Page.Culture = _culture;
        Page.UICulture = _culture;
        Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo(_culture);
        Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo(_culture);
    }

2.

<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”Template.aspx.cs”
Inherits=”Template” culture=”auto” uiculture=”auto” %>