Regex.IsMatch Method (String, String, RegexOptions)

Indicates whether the regular expression finds a match in the input string, using the regular expression specified in the pattern parameter and the matching options supplied in the options parameter.

Namespace: System.Text.RegularExpressions
Assembly: System (in system.dll)

public static bool IsMatch (
	string input,
	string pattern,
	RegexOptions options
public static boolean IsMatch (
	String input, 
	String pattern, 
	RegexOptions options
public static function IsMatch (
	input : String, 
	pattern : String, 
	options : RegexOptions
) : boolean
Not applicable.



The string to search for a match.


The regular expression pattern to match.


A bitwise OR combination of RegexOptions enumeration values.

Return Value

true if the regular expression finds a match; otherwise, false.

Exception typeCondition


input is a null reference (Nothing in Visual Basic).


pattern is a null reference (Nothing in Visual Basic).


options is not a valid RegexOptions value.

The two static IsMatch methods are equivalent to constructing a Regex object with the specified regular expression pattern and calling the instance method IsMatch.

The pattern parameter consists of various regular expression language elements that symbolically describe the string to match. For more information about regular expressions, see .NET Framework Regular Expressions and Regular Expression Language Elements.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0