How to generate a class file & access it universally

Question

User-1753299103 posted

I use ASP.NET WebPages2 with an App_Code folder. 

How can I generate a class file for the following code in my App_Code folder and access it in other pages:

    var vblip = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
    if (!string.IsNullOrEmpty(vblip))
    {
        string[] addresses = vblip.Split(',');
        if (addresses.Length != 0)
        {
            vblip = addresses[0];
        }
    }else{
        vblip = System.Web.HttpContext.Current.Request.Headers.Get("CF-Connecting-IP");
        if (String.IsNullOrEmpty(vblip))
        {
            vblip = System.Web.HttpContext.Current.Request.UserHostAddress;
        }
    }

Thanks