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how can you easily check if access is denied for a file in .NET?

Basically, I would like to check if I have rights to open the file before I actually try to open it; I do not want to use a try/catch for this check unless I have to. Is there a file access property I can check before hand? ...
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How to remove underline from a link in HTML?

In my page I have put some links under which I don't want any line, so, how can I remove that using HTML? 8 Answers ...
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Will iOS launch my app into the background if it was force-quit by the user?

I am triggering a background fetch by using the content-available flag on a push notification. I have the fetch and remote-notification UIBackgroundModes enabled. ...
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How to render a PDF file in Android

Android does not have PDF support in its libraries. Is there any way to render PDF files in the Android applications? 9 Ans...
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How to pause a YouTube player when hiding the iframe?

I have a hidden div containing a YouTube video in an <iframe> . When the user clicks on a link, this div becomes visible, the user should then be able to play the video. ...
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How could I use requests in asyncio?

I want to do parallel http request tasks in asyncio , but I find that python-requests would block the event loop of asyncio . I've found aiohttp but it couldn't provide the service of http request using a http proxy. ...
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What goes into the “Controller” in “MVC”?

I think I understand the basic concepts of MVC - the Model contains the data and behaviour of the application, the View is responsible for displaying it to the user and the Controller deals with user input. What I'm uncertain about is exactly what goes in the Controller. ...
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Android emulator doesn't take keyboard input - SDK tools rev 20

I've upgraded the SDK tools to revision 20 (from 18) and since the upgrade, the emulator doesn't seem to accept input from laptop's keyboard. But only using the emulator's own 'soft' keyboard (that appears when an input field is focused). ...
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AES vs Blowfish for file encryption

I want to encrypt a binary file. My goal is that to prevent anyone to read the file who doesn't have the password. 7 Answer...
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How to convert int[] into List in Java?

How do I convert int[] into List<Integer> in Java? 20 Answers 20 ...