Regex.Replace Method (String, String, Int32, Int32)

Replaces up to a specified number of occurrences of a pattern in the input string defined by the regular expression specified in the Regex constructor with a specified replacement string, starting at a specified character position in the input string.

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

public string Replace (
	string input,
	string replacement,
	int count,
	int startat
public String Replace (
	String input, 
	String replacement, 
	int count, 
	int startat
public function Replace (
	input : String, 
	replacement : String, 
	count : int, 
	startat : int
) : String



The string to modify.


The replacement string.


Maximum number of times the replacement can occur.


The character position in the input string where the search will begin.

Return Value

The modified character string.

If count is negative, replacements continue to the end of the string. The other two forms of replace simply supply default values for count (-1) and startat (zero when left-to-right, or input.Length when right-to-left).

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

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