问如何将会话变量存储在单独的变量中

EN

       using (SqlConnection con = new SqlConnection(CS))
    {
        SqlCommand cmdManID = new SqlCommand("SELECT 
        managerID,userEmailAddress,userName FROM [MANAGER] ,[USER] WHERE 
        [MANAGER].managerID = [USER].userID AND [USER].userName= @Uname;",con);
        cmdManID.Parameters.Add(new SqlParameter("@Uname", 
        Session["UName"]));

        con.Open();
    }

        int manID = cmdManID.ExecuteNonQuery();

        //manID;



        con.Close();