The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

Path.InvalidPathChars Field

Note: This API is now obsolete. The non-obsolete alternative is GetInvalidPathChars().

Provides a platform-specific array of characters that cannot be specified in path string arguments passed to members of the Path class.

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

[ObsoleteAttribute("Please use GetInvalidPathChars or GetInvalidFileNameChars instead.")]
public static readonly char[] InvalidPathChars

Field Value

Type: System.Char[]
A character array of invalid path characters for the current platform.

The array returned from this method is not guaranteed to contain the complete set of characters that are invalid in file and directory names. The full set of invalid characters can vary by file system. For example, on Windows-based desktop platforms, invalid path characters might include ASCII/Unicode characters 1 through 31, as well as quote ("), less than (<), greater than (>), pipe (|), backspace (\b), null (\0) and tab (\t).

Caution noteCaution

Do not use InvalidPathChars if you think your code might execute in the same application domain as untrusted code. InvalidPathChars is an array, so its elements can be overwritten. If untrusted code overwrites elements of InvalidPathChars, it might cause your code to malfunction in ways that could be exploited.

The following code example demonstrates the use of the InvalidPathChars property.


foreach (char c in Path.GetInvalidPathChars())
// This code produces output similar to the following:
// Note that the InvalidPathCharacters contain characters
// outside of the printable character set.
// Path.AltDirectorySeparatorChar=/
// Path.DirectorySeparatorChar=\
// Path.PathSeparator=;
// Path.VolumeSeparatorChar=:

.NET Framework

Supported in: 1.1, 1.0
Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5
Obsolete (compiler warning) in 3.5 SP1
Obsolete (compiler warning) in 3.0
Obsolete (compiler warning) in 3.0 SP1
Obsolete (compiler warning) in 3.0 SP2
Obsolete (compiler warning) in 2.0
Obsolete (compiler warning) in 2.0 SP1
Obsolete (compiler warning) in 2.0 SP2

.NET Framework Client Profile

Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.

Community Additions

© 2015 Microsoft