partial class MyPage1 : LayoutsPageBase

using System;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;

namespace ASPxProj.Layouts.ASPxProj
{
    public partial class MyPage1 : LayoutsPageBase
    {
        SPWeb thisWeb = SPContext.Current.Web;

        protected void Page_Load(object sender, EventArgs e)
        {
            Response.Write( Server.MapPath("~/"));
            Response.Write("<br />");
            Response.Write(thisWeb.CurrentUser.Name);
            Response.Write("<br />");
            SPList list = thisWeb.Lists["ListForTest"];  
            Response.Write("ListForTest itemCount: "+ list.ItemCount );
            Response.Write("<br />");

        }
    }
}