如何确保 Silverlight OOB 应用程序只有一个实例？
有没有办法确保仅运行受信任的 Silverlight 4 Out Of Browser 应用程序的桌面版本的单个实例？
或者我是否需要通过创建某种粗略的互斥体来手动强制执行此操作？
如果我必须自己强制执行此操作，我会考虑在独立存储中创建一个文件作为锁，然后在退出时将其删除。我会在启动时检查此文件是否存在，以防止打开后续实例。 显然，我需要一种方法来处理应用程序崩溃或以其他方式退出，以防止锁定文件被删除。我的本能是让文件超时，因此如果文件已经超过一定时间则忽略它。不幸的是，该应用程序可以播放电影，因此在正常情况下它可能会运行几个小时。在这种情况下，几个小时的锁定超时不太可能受到任何用户的欢迎。还有更好的解决方案吗？
Is there a way to ensure that only a single instance of the desktop version of a trusted Silverlight 4 Out Of Browser app will run?
Or do I need to manually enforce this through the creation of a crude mutex of some sort?
If I must enforce this myself, I'd look at creating a file in isolated storage as a lock and then deleting it on exit. I'd check this files existence on launch to prevent opening a subsequent instance.
Obviously I'd need a way to handle the app crashing or exiting some other way that prevents the lock file from being deleted. My instinct would be to have a timeout on the file and so ignore it if it's over a certain period of time old. Unfortunately, the app plays movies so it's likely it will run for several hours under normal circumstances. A lock timeout of a few hours isn't likely to be popular with any users in this situation. Are there any better solutions?
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