ASP.NET Master page hiddensession BaseMasterPage.cs

 Create BaseMasterPage.cs file in App_Code/Common/

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public class BaseMasterPage : MasterPage

{

    protected HiddenField hiddenSession;

    public BaseMasterPage()

    {

        //

        // TODO: Add constructor logic here

        //

    }

    public string SessionText

    {

        get

        {

            return hiddenSession.Value;

        }

    }

}