which of the following code samples will check if a file is..., C#, .Net Technology

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Question:Which of the following code samples will check if a file is in use?

A protected virtual bool IsFileLocked(FileInfo file) { 
FileStream stream = null; 
 try { 
  stream = file.Open(FileMode.Open, FileAccess.ReadWrite, FileShare.None);
 } catch (IOException) {
  return true;
 } finally { 
   if (stream != null) 
   stream.Close(); 
} 
return false; 
} 
B try { using (Stream stream = new FileStream("MyFilename.txt", FileMode.Open)) { } } catch { } 
C internal static bool FileOrDirectoryExists(string name) { return (Directory.Exists(name) || File.Exists(name)) } 
D FileInfo file = new FileInfo("file.txt"); if (file.Exists) { // TO DO }

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Question:Which of the following code samples will check if a file is in use?

A protected virtual bool IsFileLocked(FileInfo file) { FileStream stream = null; try { stream = file.Open(FileMode.Open, FileAccess.ReadWrite, FileShare.None); } catch (IOException) { return true; } finally { if (stream != null) stream.Close(); } return false; }

B try { using (Stream stream = new FileStream("MyFilename.txt", FileMode.Open)) { } } catch { }

C internal static bool FileOrDirectoryExists(string name) { return (Directory.Exists(name) || File.Exists(name)) }

D FileInfo file = new FileInfo("file.txt"); if (file.Exists) { // TO DO }

A