iOS Safari에서 ASP.NET Control 렌더링 이상 현상 해결 방법

protected void Page_PreInit(object sender, EventArgs e)
{
    if (Request.UserAgent != null && Request.UserAgent.IndexOf("AppleWebKit", StringComparison.CurrentCultureIgnoreCase) > -1)
     {
          this.ClientTarget = "uplevel";
     }
}