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DirectoryInfo.EnumerateDirectories Method

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

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

public IEnumerable<DirectoryInfo> EnumerateDirectories()

Return Value

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

ExceptionCondition
DirectoryNotFoundException

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

SecurityException

The caller does not have the required permission.

The EnumerateDirectories and GetDirectories methods differ as follows:

Therefore, when you are working with many files and directories, EnumerateDirectories can be more efficient.

This method pre-populates the values of the following DirectoryInfo 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 subdirectories under the C:\Program Files directory and uses a LINQ query to return the names of all directories that were created before 2009 by checking the value of the CreationTimeUtc property.

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

DirectoryInfo dirPrograms = new DirectoryInfo(@"c:\program files");
DateTime StartOf2009 = new DateTime(2009, 01, 01);

var dirs = from dir in dirPrograms.EnumerateDirectories()
            where dir.CreationTimeUtc < StartOf2009
            select new
            {
                ProgDir = dir,
            };

foreach (var di in dirs)
{
    Console.WriteLine("{0}", di.ProgDir.Name);
}

.NET Framework

Supported in: 4.5, 4

.NET Framework Client Profile

Supported in: 4

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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