application内置对象的问题

<asp:LinkButton ID="player1" 
                    runat="server" PostBackUrl="~/GameHall.aspx?pos=1" onclick="player1_Click" >
                                     
                                    
</asp:LinkButton>


这个代码怎么看，
<%
                                        =((WebApplication1.Desk)((WebApplication1.Hall)Application["hall"]).desks[0]).chair0
                                     %>

application是内置对象我看懂了，这形式看不懂，求解释？前面的WebApplication1.Desk  和WebApplication1.Hall 类似于类型的强制转换么？？

补充：.NET技术 ,  ASP.NET