The System.Text.RegularExpressions namespace contains classes that provide access to the.NET Framework regular expression engine. The namespace provides regular expression functionality that may be used from any platform or language that runs within the Microsoft.NET Framework.

	Class	Description
	Capture	Represents the results from a single subexpression capture. Capture represents one substring for a single successful capture.
	CaptureCollection	Represents a sequence of capture substrings. CaptureCollection returns the set of captures done by a single capturing group.
	Group	Group represents the results from a single capturing group. A capturing group can capture zero, one, or more strings in a single match because of quantifiers, so Group supplies a collection of Capture objects.
	GroupCollection	Represents a collection of captured groups. GroupCollection returns the set of captured groups in a single match.
	Match	Represents the results from a single regular expression match.
	MatchCollection	Represents the set of successful matches found by iteratively applying a regular expression pattern to the input string.
	Regex	Represents an immutable regular expression.
	RegexCompilationInfo	Provides information that the compiler uses to compile a regular expression to a stand-alone assembly.
	RegexRunner	The RegexRunner class is the base class for compiled regular expressions.
	RegexRunnerFactory	Creates a RegexRunner class for a compiled regular expression.

Delegates

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	Delegate	Description
	MatchEvaluator	Represents the method that is called each time a regular expression match is found during a Replace method operation.

Enumerations

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	Enumeration	Description
	RegexOptions	Provides enumerated values to use to set regular expression options.