This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.Namespace: System.Text.RegularExpressions
Assembly: System (in system.dll)
|Compiled||Specifies that the regular expression is compiled to an assembly. This yields faster execution but increases startup time.|
|CultureInvariant||Specifies that cultural differences in language is ignored. See Performing Culture-Insensitive Operations in the RegularExpressions Namespace for more information.|
|ECMAScript||Enables ECMAScript-compliant behavior for the expression. This value can be used only in conjunction with the IgnoreCase, Multiline, and Compiled values. The use of this value with any other values results in an exception.|
|ExplicitCapture||Specifies that the only valid captures are explicitly named or numbered groups of the form (?<name>…). This allows unnamed parentheses to act as noncapturing groups without the syntactic clumsiness of the expression (?:…).|
|IgnoreCase||Specifies case-insensitive matching.|
|IgnorePatternWhitespace||Eliminates unescaped white space from the pattern and enables comments marked with #. However, the IgnorePatternWhitespace value does not affect or eliminate white space in character classes.|
|Multiline||Multiline mode. Changes the meaning of ^ and $ so they match at the beginning and end, respectively, of any line, and not just the beginning and end of the entire string.|
|None||Specifies that no options are set.|
|RightToLeft||Specifies that the search will be from right to left instead of from left to right.|
|Singleline||Specifies single-line mode. Changes the meaning of the dot (.) so it matches every character (instead of every character except \n).|
The following example illustrates the application of this enumeration to a Regex instance.
// Define a regular expression for repeated words. Regex rx = new Regex(@"\b(?<word>\w+)\s+(\k<word>)\b", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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.