Char.IsSymbol Method (Char)
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Indicates whether the specified Unicode character is categorized as a symbol character.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Shared Function IsSymbol ( _
c As Char _
) As Boolean
public static bool IsSymbol(
char c
)
Parameters
- c
Type: System.Char
A Unicode character.
Return Value
Type: System.Boolean
true if c is a symbol character; otherwise, false.
Remarks
Valid symbols are members of the following categories in UnicodeCategory: MathSymbol, CurrencySymbol, ModifierSymbol, and OtherSymbol.
Symbols in the Unicode standard are a loosely defined set of characters that include the following:
Currency symbols.
Letterlike symbols, which include a set of mathematical alphanumeric symbols, as well as such symbols as ℅, №, and ™.
Number forms, such as subscripts and superscripts.
Mathematical operators and arrows.
Geometric symbols.
Technical symbols.
Braille patterns.
Dingbats.
Examples
The following example demonstrates IsSymbol.
Module Example
Public Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
Dim str As String
str = "non-symbolic characters"
outputBlock.Text &= Char.IsSymbol("+"c) & vbCrLf ' Output: "True"
outputBlock.Text += String.Format(Char.IsSymbol(str, 8)) & vbCrLf ' Output: "False"
End Sub
End Module
using System;
public class Example
{
public static void Demo(System.Windows.Controls.TextBlock outputBlock)
{
string str = "non-symbolic characters";
outputBlock.Text += Char.IsSymbol('+') + "\n"; // Output: "True"
outputBlock.Text += Char.IsSymbol(str, 8) + "\n"; // Output: "False"
}
}
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.