File.Exists() returns false for some files under Program Files

Question

I thought it was due to some permission issue, but that does not seem to be the case. The file has "Read & Execute, Read" permissions for "Users", and "Full control" for "Administrators" and "SYSTEM". Can there be other reasons why File.Exists() returns false?

PS: I did not think the code was important, so I did not type the code, but if that is the rule, here is the text version of the code.
    static void Main(string[] args)
    {
        var app = @"C:Program Files(x86)VideoLANVLCvlc.exe";
        var psi = new ProcessStartInfo();
        psi.FileName = Path.GetFileName(app);
        psi.WorkingDirectory = Path.GetDirectoryName(app);
        Process.Start(psi);
    }

Anyway, there seems to be a weird behaviour of pasting path in Visual Studio. If I use "Copy as path" in File Explorer and paste it into an empty string, VS removes the space between Files and (x86).

paxdiablo · Answer

On your file-system, there's a space between Files and (x86). You don't have that in the string you're using to get at the file, so it should be changed to:
var app = @"C:Program Files (x86)VideoLANVLCvlc.exe";
//                          ^
//                      need this

In terms of your statement that:

Anyway, there seems to be a weird behaviour of pasting path in Visual Studio. If I use "Copy as path" in File Explorer and paste it into an empty string, VS removes the space between Files and (x86).

That's almost certainly down to auto-formatting, which is done on paste among other things (though you can disable it, or use CTRL+Z to back up, since it appears to paste and then format).
Since you paste a "quoted thing" inside quotes to end up with ""quoted thing"", the quoted thing bit is now outside quotes and therefore subject to auto-formatting.
Had you copied the file name without the quotes, or copied it with the quotes but pasted to a non-quoted area, I suspect it would have been put in unmodified (as a quoted string).

File.Exists() returns false for some files under Program Files

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