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

* (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 DirectoryInfo.EnumerateFileSystemInfos and DirectoryInfo.GetFileSystemInfos methods differ as follows:

• When you use DirectoryInfo.EnumerateFileSystemInfos, you can start enumerating the collection of System.IO.FileInfo objects before the whole collection is returned.

• When you use DirectoryInfo.GetFileSystemInfos, you must wait for the whole array of System.IO.FileSystemInfo objects to be returned before you can access the array.

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

This method pre-populates the values of the following System.IO.FileSystemInfo properties:

• FileSystemInfo.Attributes

• FileSystemInfo.CreationTime

• FileSystemInfo.CreationTimeUtc

• FileSystemInfo.LastAccessTime

• FileSystemInfo.LastAccessTimeUtc

• FileSystemInfo.LastWriteTime

• FileSystemInfo.LastWriteTimeUtc

The returned collection is not cached; each call to the IEnumerable`1.GetEnumerator method on the collection will start a new enumeration.

Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 4.0.0.0