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You can add the JournalOwnership property to the Frame object in the MainPage.xaml file, which defines a frame either as being responsible for managing its own navigation history, or integrating with the Web browser journal. By default, it is set to Automatic, which automatically records navigation history to the browser journal, allowing navigation integrated with the browser. In this case, now you can use the back and forward buttons to navigate pages within the Silverlight application. You can set the value of the JournalOwnership property to OwnsJournal to store history only in the Frame control journal. If set to UsesParentJournal, then the Frame control will follow the settings of the parent Frame control s JournalOwnership property. If there is no parent Frame control, then the navigation history will be stored in the browser journal. Note that if you are running an out-of-browser application, you cannot implement the navigation integrated with the browser. It will always run in the OwnsJournal mode while running in the out-of-browser mode. You also need to add an iframe named _sl_historyFrame to the page hosting the Silverlight application plug-in, which is already added as part of the hosting pages (ASPX and HTML) created as The IL instruction set contains three instructions intended for the direct method calls (well, direct in the sense that all these instructions directly specify the method being called; some purists would not consider a virtual call direct, because under the hood it is done via the v-table): jmp <token> (0x27). Abandon the current method and jump to the target method, specified by <token>, transferring the current arguments in their present state (which may be different from the original state, because the calling method could change the argument values before the jump). Everything else of the current method, including local variables and locally allocated memory, is abandoned. At the moment jmp is invoked, the evaluation stack must be empty, and the arguments are transferred automatically. Because of this, the signature of the target method must exactly match the signature of the method invoking jmp. This instruction should not be used within EH blocks .try, catch, filter, fault, or finally blocks, discussed in 14 or within a synchronized region (the code segment protected by a thread lock, such as a mutex). The jmp instruction is unverifiable. call <token> (0x28). Call an instance or static method nonvirtually. You can also call a virtual method, but in this case it is called not through the type s v-table. (If this sounds somehow vague to you, you might want to return to 10 and, more precisely, to the sample file Virt_not.il.) The real difference between virtual and nonvirtual instance methods becomes obvious when you create an instance of a class, cast it to the parent type of the class, and then call instance methods on this child-posing-as-parent instance. The nonvirtual methods are called directly, bypassing the child type s v-table,
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