Determines whether the given path refers to an existing directory on disk.

   

using System;
using System.IO;
using System.Collections;

public class RecursiveFileProcessor 
{
    public static void Main(string[] args) 
    {
        foreach(string path in args) 
        {
            if(File.Exists(path)) 
            {
                // This path is a file
                ProcessFile(path); 
            }               
            else if(Directory.Exists(path)) 
            {
                // This path is a directory
                ProcessDirectory(path);
            }
            else 
            {
                Console.WriteLine("{0} is not a valid file or directory.", path);
            }        
        }        
    }
    public static void ProcessDirectory(string targetDirectory) 
    {
        string [] fileEntries = Directory.GetFiles(targetDirectory);
        foreach(string fileName in fileEntries)
            ProcessFile(fileName);

        string [] subdirectoryEntries = Directory.GetDirectories(targetDirectory);
        foreach(string subdirectory in subdirectoryEntries)
            ProcessDirectory(subdirectory);
    }
    public static void ProcessFile(string path) 
    {
        Console.WriteLine(path);      
    }
}

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20.	illustrates the Directory class 2
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33.	Creates all directories and subdirectories in the specified path.
34.	Create new nested directories
35.	Deletes an empty directory from a specified path.
36.	Deletes the directory any subdirectories and files in the directory.
37.	Returns an enumerable collection of directory names in a specified path.
38.	Returns an enumerable collection of directory names that match a search pattern in a specified path.
39.	Get collection of directory names that match a search pattern, and optionally searches subdirectories.
40.	Returns an enumerable collection of file names in a specified path.
41.	Returns an enumerable collection of file names that match a search pattern in a specified path.
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44.	Gets the creation date and time of a directory.
45.	Gets the creation date and time, in Coordinated Universal Time (UTC) format, of a directory.
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48.	Returns the volume information, root information, or both for the specified path.
49.	Returns the names of files that match the specified search pattern
50.	Returns the names of all files and subdirectories in the specified directory.
51.	Returns the date and time the specified file or directory was last accessed.
52.	Returns the date and time the specified file or directory was last written to.
53.	Sets the date and time the specified file or directory was last accessed.
54.	Sets the date and time a directory was last written to.
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64.	Find all files in a directory, and all files within every nested directory. (2)
65.	Current Dir
66.	Directory Walker
67.	Create Directory
68.	Class, which describes folder with its subfolders.

Determines whether the given path refers to an existing directory on disk. : Directory « File Stream « C# / C Sharp

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