IsLetterOrDigit Method (Char)
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Char.IsLetterOrDigit Method (Char)

Indicates whether the specified Unicode character is categorized as a letter or a decimal digit.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static bool IsLetterOrDigit(
	char c


Type: System.Char
The Unicode character to evaluate.

Return Value

Type: System.Boolean
true if c is a letter or a decimal digit; otherwise, false.

Valid alphabetic letters and decimal digits are members of the following categories in UnicodeCategory: UppercaseLetter, LowercaseLetter, TitlecaseLetter, ModifierLetter, OtherLetter, or DecimalDigitNumber.

The following example demonstrates IsLetterOrDigit.

using System;

public class Example
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
      string str = "newline:\n";

      outputBlock.Text += Char.IsLetterOrDigit('8').ToString() + "\n";	
      outputBlock.Text += (Char.IsLetterOrDigit(str, 8).ToString()) + "\n";
// The example displays the following output:
//    True
//    False


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

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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