Contains a set of known whitespace characters from different languages. This should be equivalent to the set of characters for which IsWhiteSpace(char) returns true, which however is incomplete in earlier .Net versions.

The elements of the array are sorted in ascending order, so binary search can be used.

Declaration

public static readonly char[] WhitespaceCharacters

Field Value

Type	Description
char[]

Properties

UppercaseCharacters

Gets a collection of all characters in the range [U+0020, U+00FB] for which IsUpper(char) is true.

Declaration

public static char[] UppercaseCharacters { get; }

Property Value

Type	Description
char[]

Methods

GetCase(char)

Determines the case of a character. Only upper and lower case characters are distinguished, in all other cases or for non-letter characters, Other is returned.

Declaration

public static CharacterProperties.Case GetCase(char c)

Parameters

Type	Name	Description
char	c

Returns

Type	Description
CharacterProperties.Case

GetCase(string)

Determines the case of the string, if it is consistent.

Declaration

public static CharacterProperties.Case GetCase(string s)

Parameters

Type	Name	Description
string	s

Returns

Type	Description
CharacterProperties.Case

GetCase(string, int)

Determines the case of the string, if it is consistent. The string is only scanned up to the specified length.

Declaration

public static CharacterProperties.Case GetCase(string s, int length)

Parameters

Type	Name	Description
string	s
int	length

Returns

Type	Description
CharacterProperties.Case

GetPrefixLength(string, Predicate<char>)

Computes and returns the length of the prefix of the provided string s where each character satisfies the provided predicate.

Declaration

public static int GetPrefixLength(string s, Predicate<char> predicate)

Parameters

Type	Name	Description
string	s
Predicate<char>	predicate

Returns

Type	Description
int

GetUnicodeBlock(char)

Attempts to identify the UnicodeBlock for the provided character.

Declaration

public static UnicodeBlock GetUnicodeBlock(char c)

Parameters

Type	Name	Description
char	c	A character to get the UnicodeBlock for.

Returns

Type	Description
UnicodeBlock	The UnicodeBlock for `c`, or Unknown if the block cannot be determined.

GetUnicodeCategoryFromName(string)

Maps Unicode category names as they are used in CharacterSets to the corresponding UnicodeCategory. The lookup is case-insensitive.

Declaration

public static UnicodeCategory? GetUnicodeCategoryFromName(string className)

Parameters

Type	Name	Description
string	className	The category name

Returns

Type	Description
UnicodeCategory?	The corresponding UnicodeCategory, or `null` if the class name is not known.

GetUnicodeCategoryName(UnicodeCategory)

Maps from UnicodeCategory to class names as they are used in CharacterSets.

Declaration

public static string GetUnicodeCategoryName(UnicodeCategory cat)

Parameters

Type	Name	Description
UnicodeCategory	cat	The Unicode category

Returns

Type	Description
string	A category name, to be used in character sets.

IsAll(string, int, Predicate<char>)

Evaluates the predicate on all characters in the string, starting from position start, and returns true if all characters fulfill the predicate, and false otherwise. Note that the method will always return true for the empty string or if the start position exceeds the string length.

Declaration

public static bool IsAll(string s, int start, Predicate<char> predicate)

Parameters

Type	Name	Description
string	s
int	start
Predicate<char>	predicate

Returns

Type	Description
bool	true if all characters fulfill the predicate, or `s` is the empty string, or `start` exceeds the string length, and false otherwise.

IsAll(string, Predicate<char>)

Evaluates the predicate on all characters in the string and returns true if all characters fulfill the predicate, and false otherwise. Note that the method will always return true for the empty string.

Declaration

public static bool IsAll(string s, Predicate<char> predicate)

Parameters

Type	Name	Description
string	s
Predicate<char>	predicate

Returns

Type	Description
bool	true if all characters fulfill the predicate or `s` is the empty string, and false otherwise.

IsApostrophe(char)

Determines whether the specified character is an apostrophe.

Declaration

public static bool IsApostrophe(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is an apostrophe, otherwise false.

IsBlank(char)

Determines whether the specified character is a blank.

This test does not cover format characters.

Declaration

public static bool IsBlank(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a blank, otherwise false.

IsBrace(char)

Determines whether the specified character is a brace.

Declaration

public static bool IsBrace(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a brace, otherwise false.

IsBracket(char)

Determines whether the specified character is an opening or a closing bracket.

Declaration

public static bool IsBracket(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is an opening or a closing bracket, otherwise false.

IsCJKChar(char)

Tests whether c is a CJK (Chinese/Japanese/Korean) character - note, this does NOT include modern Korean characters

Declaration

public static bool IsCJKChar(char c)

Parameters

Type	Name	Description
char	c

Returns

Type	Description
bool	true if `c` is a CJK (Chinese/Japanese/Korean) character, false otherwise.

Remarks

Regarding Korean, the character ranges covered include (not necessarily all) the largely-archaic Hanja characters. To test for Hangul characters, use IsKoreanChar(char)

IsCJKPunctuation(char)

Tests whether the provided character c is a CJK (Chinese/Japanese/Korean) punctuation characater.

Declaration

public static bool IsCJKPunctuation(char c)

Parameters

Type	Name	Description
char	c

Returns

Type	Description
bool	true if `c` is a CJK (Chinese/Japanese/Korean) punctuation, and false otherwise

IsClosingBracket(char)

Determines whether the specified character is a closing bracket.

Declaration

public static bool IsClosingBracket(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a closing bracket, otherwise false.

IsClosingParenthesis(char)

Determines whether the specified character is a closing paranthesis.

Declaration

public static bool IsClosingParenthesis(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a closing paranthesis, otherwise false.

IsClosingQuote(char)

Determines whether the specified character is a closing quote.

Declaration

public static bool IsClosingQuote(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a closing quote, otherwise false.

IsColon(char)

Determines whether the specified character is a colon.

Declaration

public static bool IsColon(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a colon, otherwise false.

IsComma(char)

Determines whether the specified character is a comma.

Declaration

public static bool IsComma(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a comma, otherwise false.

IsDash(char)

Determines whether the specified character is a dash.

Declaration

public static bool IsDash(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a dash, otherwise false.

IsDot(char)

Determines whether the specified character is a dor.

Declaration

public static bool IsDot(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a dot, otherwise false.

IsDoubleQuote(char)

Determines whether the specified character is a double quote.

Declaration

public static bool IsDoubleQuote(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a double quote, otherwise false.

IsExclamation(char)

Determines whether the specified character is an exclamation mark.

Declaration

public static bool IsExclamation(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is an exclamation mark, otherwise false.

IsHyphen(char)

Determines whether the specified character is a hyphen.

Declaration

public static bool IsHyphen(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a hyphen, otherwise false.

IsInBlock(char, UnicodeBlock)

Tests whether c is contained in the UnicodeBlock b.

Declaration

public static bool IsInBlock(char c, UnicodeBlock b)

Parameters

Type	Name	Description
char	c	A character
UnicodeBlock	b	A UnicodeBlock

Returns

Type	Description
bool	`true` if `c` is contained in `b`, and `false` otherwise.

IsJaLongVowelMarker(char)

Tests whether c is the JA long vowel marker

Declaration

public static bool IsJaLongVowelMarker(char c)

Parameters

Type	Name	Description
char	c

Returns

Type	Description
bool

IsKoreanChar(char)

Tests whether c is a Hangul character, precomposed or otherwise

Declaration

public static bool IsKoreanChar(char c)

Parameters

Type	Name	Description
char	c

Returns

Type	Description
bool

IsLatinLetter(char)

Determines whether the specified character is a Latin-alphabet letter, single or double width

Declaration

public static bool IsLatinLetter(char c)

Parameters

Type	Name	Description
char	c

Returns

Type	Description
bool

IsOpeningBracket(char)

Determines whether the specified character is an opening bracket.

Declaration

public static bool IsOpeningBracket(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is an opening bracket, otherwise false.

IsOpeningParenthesis(char)

Determines whether the specified character is an opening paranthesis.

Declaration

public static bool IsOpeningParenthesis(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is an openint paranthesis, otherwise false.

IsOpeningQuote(char)

Determines whether the specified character is an opening quote.

Declaration

public static bool IsOpeningQuote(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is an opening quote, otherwise false.

IsParagraph(char)

Determines whether the specified character is a paragraph separator.

Declaration

public static bool IsParagraph(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a paragraph separator, otherwise false.

IsParenthesis(char)

Determines whether the specified character is an opening or a closing paranthesis.

Declaration

public static bool IsParenthesis(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is an opening or a closing , otherwise false.

IsPercent(char)

Determines whether the specified character is a percent character.

Declaration

public static bool IsPercent(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a percent character, otherwise false.

IsQuestion(char)

Determines whether the specified character is a question mark.

Declaration

public static bool IsQuestion(char c)

Parameters

Type	Name	Description
char	c	The characters.

Returns

Type	Description
bool	true if c is a question mark, otherwise false.

IsQuote(char)

Determines whether the specified character is a quote.

Declaration

public static bool IsQuote(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a quote, otherwise false.

IsSemicolon(char)

Determines whether the specified character is a semicolon.

Declaration

public static bool IsSemicolon(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a semicolon, otherwise false.

IsSequenceOf(string, UnicodeCategory)

Determines whether the specified string is a sequence of characters of the specified unicode category c.

Declaration

public static bool IsSequenceOf(string s, UnicodeCategory c)

Parameters

Type	Name	Description
string	s	The string.
UnicodeCategory	c	The Unicode category.

Returns

Type	Description
bool	true if all the characters in `s` have the Unicode category `c` or `s` is the empty string, otherwise false.

IsSingleQuote(char)

Determines whether the specified character is a single quote.

Declaration

public static bool IsSingleQuote(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a single quote, otherwise false.

IsStop(char)

Determines whether the specified character is a stop character such as colon, dot, exclamation mark, question mark or semicolon.

Declaration

public static bool IsStop(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a stop character, otherwise false.

IsSurrounder(char)

Determines whether the specified character is any of the known surrounder characters, such as bracket, paranthesis, quote, apostrophe or a special surrounder.

Declaration

public static bool IsSurrounder(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a any of the surrounder characters, otherwise false.

IsTabulator(char)

Determines whether the specified character is a tabulator.

Declaration

public static bool IsTabulator(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a tabulator, otherwise false.

IsUpperOrLower(char)

Returns true if c is upper or lower case, and false otherwise.

Declaration

public static bool IsUpperOrLower(char c)

Parameters

Type	Name	Description
char	c

Returns

Type	Description
bool

IsVowel(char)

Determines whether the specified character is a vowel (Western or Far East).

Declaration

public static bool IsVowel(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a vowel, otherwise false.

IsWhitespace(char)

Determines whether the specified character is a whitespace.

This test does not cover format characters.

This method is no longer required since System.char.IsWhiteSpace(char) has been fixed in .Net 3.5 to return the correct information.

Declaration

public static bool IsWhitespace(char c)

Parameters

Type	Name	Description
char	c	The character.

Returns

Type	Description
bool	true if c is a whitespace, otherwise false.

ToBase(char)

Returns a new character which is the normalized version of the input character, using full canonical decomposition.

Declaration

public static char ToBase(char c)

Parameters

Type	Name	Description
char	c	The input character.

Returns

Type	Description
char	The normalized character.

ToBase(string)

Returns a new string with the same textual value as the input string, but whose binary representation is normalized using full canonical decomposition ignoring any characters that belong to the following Unicode categories: Format, ModifierLetter, NonSpacingMark, OtherNotAssigned, ParagraphSeparator, PrivateUse, SpaceSeparator, SpacingCombiningMark.

Declaration

public static string ToBase(string s)

Parameters

Type	Name	Description
string	s	The input string.

Returns

Type	Description
string	The normalized string.

ToBase(string, bool)

See ToBase(string)

Declaration

public static string ToBase(string s, bool skipSurrogates)

Parameters

Type	Name	Description
string	s
bool	skipSurrogates	If true, no changes will be applied if any surrogate-pair bytes are found after decomposition

Returns

Type	Description
string

ToCase(char, Case)

Applies the specified casing to the provided character.

Declaration

public static char ToCase(char ch, CharacterProperties.Case c)

Parameters

Type	Name	Description
char	ch
CharacterProperties.Case	c

Returns

Type	Description
char

ToCase(string, Case)

Applies the specified casing to the provided string.

Declaration

public static string ToCase(string s, CharacterProperties.Case c)

Parameters

Type	Name	Description
string	s
CharacterProperties.Case	c

Returns

Type	Description
string