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Showing content from https://learn.microsoft.com/en-us/dotnet/api/system.io.filesysteminfo below:

FileSystemInfo Class (System.IO) | Microsoft Learn

public ref class FileSystemInfo abstract

public ref class FileSystemInfo abstract : MarshalByRefObject, System::Runtime::Serialization::ISerializable

public abstract class FileSystemInfo

public abstract class FileSystemInfo : MarshalByRefObject, System.Runtime.Serialization.ISerializable

[System.Serializable]
public abstract class FileSystemInfo : MarshalByRefObject, System.Runtime.Serialization.ISerializable

[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public abstract class FileSystemInfo : MarshalByRefObject, System.Runtime.Serialization.ISerializable

type FileSystemInfo = class

type FileSystemInfo = class
    inherit MarshalByRefObject
    interface ISerializable

[<System.Serializable>]
type FileSystemInfo = class
    inherit MarshalByRefObject
    interface ISerializable

[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type FileSystemInfo = class
    inherit MarshalByRefObject
    interface ISerializable

Public MustInherit Class FileSystemInfo

Public MustInherit Class FileSystemInfo
Inherits MarshalByRefObject
Implements ISerializable

Inheritance

Inheritance

Derived

Attributes

Implements

The following example shows how to loop through all the files and directories, querying some information about each entry.

using System;
using System.IO;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            //  Loop through all the immediate subdirectories of C.
            foreach (string entry in Directory.GetDirectories(@"C:\"))
            {
                DisplayFileSystemInfoAttributes(new DirectoryInfo(entry));
            }
            //  Loop through all the files in C.
            foreach (string entry in Directory.GetFiles(@"C:\"))
            {
                DisplayFileSystemInfoAttributes(new FileInfo(entry));
            }
        }
        static void DisplayFileSystemInfoAttributes(FileSystemInfo fsi)
        {
            //  Assume that this entry is a file.
            string entryType = "File";

            // Determine if entry is really a directory
            if ((fsi.Attributes & FileAttributes.Directory) == FileAttributes.Directory )
            {
                entryType = "Directory";
            }
            //  Show this entry's type, name, and creation date.
            Console.WriteLine("{0} entry {1} was created on {2:D}", entryType, fsi.FullName, fsi.CreationTime);
        }
    }
}

 // Output will vary based on contents of drive C.

 // Directory entry C:\Documents and Settings was created on Tuesday, November 25, 2003
 // Directory entry C:\Inetpub was created on Monday, January 12, 2004
 // Directory entry C:\Program Files was created on Tuesday, November 25, 2003
 // Directory entry C:\RECYCLER was created on Tuesday, November 25, 2003
 // Directory entry C:\System Volume Information was created on Tuesday, November 2, 2003
 // Directory entry C:\WINDOWS was created on Tuesday, November 25, 2003
 // File entry C:\IO.SYS was created on Tuesday, November 25, 2003
 // File entry C:\MSDOS.SYS was created on Tuesday, November 25, 2003
 // File entry C:\pagefile.sys was created on Saturday, December 27, 2003

Imports System.IO
Module Module1

    Sub Main()
        ' Loop through all the immediate subdirectories of C.
        For Each entry As String In Directory.GetDirectories("C:\")
            DisplayFileSystemInfoAttributes(New DirectoryInfo(entry))
        Next

        ' Loop through all the files in C.
        For Each entry As String In Directory.GetFiles("C:\")
            DisplayFileSystemInfoAttributes(New FileInfo(entry))
        Next
    End Sub

    Sub DisplayFileSystemInfoAttributes(ByVal fsi As IO.FileSystemInfo)
        ' Assume that this entry is a file.
        Dim entryType As String = "File"

        ' Determine if this entry is really a directory.
        If (fsi.Attributes And FileAttributes.Directory) = FileAttributes.Directory Then
            entryType = "Directory"
        End If

        ' Show this entry's type, name, and creation date.
        Console.WriteLine("{0} entry {1} was created on {2:D}", _
            entryType, fsi.FullName, fsi.CreationTime)
    End Sub
End Module

' Output will vary based on contents of drive C.
' 
' Directory entry C:\Documents and Settings was created on Tuesday, November 25, 2003
' Directory entry C:\Inetpub was created on Monday, January 12, 2004
' Directory entry C:\Program Files was created on Tuesday, November 25, 2003
' Directory entry C:\RECYCLER was created on Tuesday, November 25, 2003
' Directory entry C:\System Volume Information was created on Tuesday, November 2, 2003
' Directory entry C:\WINDOWS was created on Tuesday, November 25, 2003
' File entry C:\IO.SYS was created on Tuesday, November 25, 2003
' File entry C:\MSDOS.SYS was created on Tuesday, November 25, 2003
' File entry C:\pagefile.sys was created on Saturday, December 27, 2003

The FileSystemInfo class contains methods that are common to file and directory manipulation. A FileSystemInfo object can represent either a file or a directory, thus serving as the basis for FileInfo or DirectoryInfo objects. Use this base class when parsing a lot of files and directories.

A derived class can inherit from FileSystemInfo only if the derived class has the AllAccess permission from the FileIOPermissionAccess enumeration.

In members that accept a path, the path can refer to a file or just a directory. The specified path can also refer to a relative path or a Universal Naming Convention (UNC) path for a server and share name. For example, all the following are acceptable paths:

• "c:\\MyDir\\MyFile.txt" in C#, or "c:\MyDir\MyFile.txt" in Visual Basic.

• "c:\\MyDir" in C#, or "c:\MyDir" in Visual Basic.

• "MyDir\\MySubdir" in C#, or "MyDir\MySubDir" in Visual Basic.

• "\\\\MyServer\\MyShare" in C#, or "\\MyServer\MyShare" in Visual Basic.

For a list of common I/O tasks, see Common I/O Tasks.

Represents the fully qualified path of the directory or file.

The path originally specified by the user, whether relative or absolute.

Gets or sets the attributes for the current file or directory.

Gets or sets the creation time of the current file or directory.

Gets or sets the creation time, in coordinated universal time (UTC), of the current file or directory.

Gets a value indicating whether the file or directory exists.

Gets the extension part of the file name, including the leading dot . even if it is the entire file name, or an empty string if no extension is present.

Gets the full path of the directory or file.

Gets or sets the time the current file or directory was last accessed.

Gets or sets the time, in coordinated universal time (UTC), that the current file or directory was last accessed.

Gets or sets the time when the current file or directory was last written to.

Gets or sets the time, in coordinated universal time (UTC), when the current file or directory was last written to.

Gets the target path of the link located in FullName, or null if this FileSystemInfo instance doesn't represent a link.

For files, gets the name of the file. For directories, gets the name of the last directory in the hierarchy if a hierarchy exists. Otherwise, the Name property gets the name of the directory.

Gets or sets the Unix file mode for the current file or directory.

• FileSystemWatcher
• DriveInfo
• File and Stream I/O
• How to: Read Text from a File
• How to: Write Text to a File
• How to: Read and Write to a Newly Created Data File

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