Regex.Replace Method (String, String, MatchEvaluator, RegexOptions)

Replaces all occurrences of a character pattern defined by a specified regular expression with a replacement character string starting at the first character. Options can be specified to modify matching behavior and a MatchEvaluator delegate is called at each match to evaluate the replacement.

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

static String^ Replace (
	String^ input, 
	String^ pattern, 
	MatchEvaluator^ evaluator, 
	RegexOptions options
public static String Replace (
	String input, 
	String pattern, 
	MatchEvaluator evaluator, 
	RegexOptions options
public static function Replace (
	input : String, 
	pattern : String, 
	evaluator : MatchEvaluator, 
	options : RegexOptions
) : String



The string to modify.


The regular expression pattern to match.


The MatchEvaluator which evaluates replacement at each step.


A bitwise OR combination of RegexOption enumeration values.

Return Value

The modified character string.

The MatchEvaluator type is a delegate that takes a single Match as input and returns a string. It is declared as follows:

public delegate String RegexMatchEvaluator(Match match);

The delegate is called once per match during a replace.

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0