Access Control value set using Session in MasterPage from Content Page in ASP.Net

Hi All,

I would like to access a label value in master page from another page under the same master page:

MASTER PAGE:

<asp:Label ID="Label1" runat="server"></asp:Label>
<asp:LinkButton ID="LinkBntAddCategory" runat="server" onclick="LinkBntAddCategory_Click">Add Categories</asp:LinkButton>

if (!IsPostBack)
{
    if (Session["UserEmail"] != null)
    {
         // Gives email of user after login:          	
         Label1.Text = Session["UserEmail"].ToString(); 
    }
}
            
protected void LinkBntAddCategory_Click(object sender, EventArgs e)
{
    Response.Redirect("QuizAddCategory.aspx");
} 

How to Access the Label1 email value after the user clicks on "Add Categories" Link ?  

QuizAddCategory.aspx is under the same masterpage Many thanks in advance