CSharp - System.Char Type

Introduction

System.Char defines a range of static methods for working with characters.

For example, You can use ToUpper to convert a char to its upper case.

You can call these through either the System.Char type or its char alias:

Demo

using System;
class MainClass{/*w w  w .ja v  a2s . com*/
   public static void Main(string[] args){
         Console.WriteLine (System.Char.ToUpper ('c'));    // C
         Console.WriteLine (char.IsWhiteSpace ('\t'));     // True
   }
}

Result

ToUpper and ToLower honor the end user's locale.

System.Char and System.String provides culture-invariant versions of ToUpper and ToLower ending with the word Invariant.

These always apply English culture rules:

Console.WriteLine (char.ToUpperInvariant ('i'));    // I

This is a shortcut for:

Console.WriteLine (char.ToUpper ('i', CultureInfo.InvariantCulture))

The following table lists static methods related to categorizing characters.

Static method	Characters included
IsLetter	A-Z, a-z, and letters of other alphabets
IsUpper	Uppercase letters
IsLower	Lowercase letters
IsDigit	0-9 plus digits of other alphabets
IsLetterOrDigit	Letters plus digits
IsNumber	All digits plus Unicode fractions and Roman numeral symbols
IsSeparator	Space plus all Unicode separator characters
IsWhiteSpace	All separators plus \n, \r, \t, \f, and \v
IsPunctuation	Symbols used for punctuation in Western and other alphabets
IsSymbol	Most other printable symbols
Static method	Characters included
IsControl	Nonprintable "control" characters below 0x20, (None) such as \r, \n, \t, \0, and characters between 0x7F and 0x9A

• Previous
• Next