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DirectoryInfo.EnumerateDirectories Method (String)

Returns an enumerable collection of directory information that matches a specified search pattern.

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

public IEnumerable<DirectoryInfo> EnumerateDirectories(
	string searchPattern
)

Parameters

searchPattern
Type: System.String

The search string to match against the names of directories. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters (see Remarks), but doesn't support regular expressions. The default pattern is "*", which returns all files.

Return Value

Type: System.Collections.Generic.IEnumerable<DirectoryInfo>
An enumerable collection of directories that matches searchPattern.

ExceptionCondition
ArgumentNullException

searchPattern is null.

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.

searchPattern can be a combination of literal and wildcard characters, but doesn't support regular expressions. The following wildcard specifiers are permitted in searchPattern.

Wildcard specifier

Matches

* (asterisk)

Zero or more characters in that position.

? (question mark)

Zero or one character in that position.

Characters other than the wildcard are literal characters. For example, the string "*t" searches for all names in ending with the letter "t". ". The searchPattern string "s*" searches for all names in path beginning with the letter "s".

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.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4
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