How to check whether an xml file can be accessed or not in c#? [closed]

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I am saving dafault values to a xml file. If I don't have access to the xml file I should show a message in the status bar to the user. How can I do that?

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Just try to open it, if you don't have access it will throw a System.UnauthorizedAccessException or if it is in use it will throw a System.IO.IOException, catch these exceptions and display an access denied message to the user.