Get Session values From Properties,,,,,,,,,,That code on current page where we get Session values
public string propertiperviuspages_AlbumMaster
        {
            get
            {
                string _AlbumMasterID = string.Empty;
                if (!string.IsNullOrEmpty(Convert.ToInt64(ViewState["AlbumMasterID"]).ToString()))
                {
                    _AlbumMasterID = ViewState["AlbumMasterID"].ToString();
                    Session["AlbumMasterID"] = _AlbumMasterID;
                }
                return _AlbumMasterID;
            }
        }


That abow session Values get on anothers pages....like that........................
 protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
             {
                if (PreviousPage != null)
                {
                    string ImageID = PreviousPage.PropertyPreviousPage;
                    string AlbumMasterID = PreviousPage.propertiperviuspages_AlbumMaster;
                }
             }
        }
 That Code or path are on Design Page where we uses on next page
<%@ PreviousPageType VirtualPath="~/Album_uploaders.aspx" %>