Returns the regular expression pattern that was passed into the Regex constructor.
Assembly: System (in System.dll)
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 - Quick Reference.Notes to Inheritors
Regex is the base class of regular expressions created by the CompileToAssembly method. These compiled regular expressions use the implementation of the base class. If called from a derived class, the method returns the string that was passed to the pattern parameter of the RegexCompilationInfo class constructor that was used to define the regular expression.
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.