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DirectoryInfo.EnumerateFiles Method

Returns an enumerable collection of file information in the current directory.

Namespace:  System.IO
Assembly:  mscorlib (in mscorlib.dll)

public IEnumerable<FileInfo> EnumerateFiles()

Return Value

Type: System.Collections.Generic.IEnumerable<FileInfo>
An enumerable collection of the files in the current directory.

ExceptionCondition
DirectoryNotFoundException

The path encapsulated in the FileInfo object is invalid (for example, it is on an unmapped drive).

SecurityException

The caller does not have the required permission.

The EnumerateFiles and GetFiles methods differ as follows: When you use EnumerateFiles, you can start enumerating the collection of FileInfo objects before the whole collection is returned; when you use GetFiles, you must wait for the whole array of FileInfo objects to be returned before you can access the array. Therefore, when you are working with many files and directories, EnumerateFiles can be more efficient.

This method pre-populates the values of the following FileInfo properties:

The returned collection is not cached; each call to the GetEnumerator method on the collection will start a new enumeration.

The following example enumerates the files under a specified directory and uses a LINQ query to return the names of all files that were created before 2009 by checking the value of the CreationTimeUtc property.

If you only need the names of the files, use the static Directory class for better performance. For an example, see the Directory.EnumerateFiles(String) method.


// Create a DirectoryInfo of the directory of the files to enumerate.
DirectoryInfo DirInfo = new DirectoryInfo(@"\\archives1\library\");

DateTime StartOf2009 = new DateTime(2009, 01, 01);

// LINQ query for all files created before 2009.
var files = from f in DirInfo.EnumerateFiles()
		   where f.CreationTimeUtc < StartOf2009
		   select f;

// Show results.
foreach (var f in files)
{
	Console.WriteLine("{0}", f.Name);
}


.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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