Why the "Model" is not define, but can use it.

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ASP.NET

Visual-Studio

MVC

VS2012

Use mvc4, vs2012.
In the .aspx page,there are the source code as blow:

<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<IEnumerable<Manage.Models.Entity.TempInfo>>" %>
......................
foreach (var item in Model)

The variable [Model] means [Manage.Models.Entity.TempInfo].
But my question is why i am not define the [Model],but can use it as a instance of [Manage.Models.Entity.TempInfo].