Char.IsControl Method (Char)

 

Indicates whether the specified Unicode character is categorized as a control character.

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

public static bool IsControl(
	char c
)

Parameters

c
Type: System.Char

The Unicode character to evaluate.

Return Value

Type: System.Boolean

true if c is a control character; otherwise, false.

Control characters are formatting and other non-printing characters, such as ACK, BEL, CR, FF, LF, and VT. T The Unicode standard assigns code points from \U0000 to \U001F, \U007F, and from \U0080 to \U009F to control characters. According to the Unicode standard, these values are to be interpreted as control characters unless their use is otherwise defined by an application. Valid control characters are members of the UnicodeCategory.Control category.

The following example lists the Unicode code point of each of the control characters.

using System;

public class ControlChars
{
   public static void Main()
   {
      int charsWritten = 0;

      for (int ctr = 0x00; ctr <= 0xFFFF; ctr++)
      {
         char ch = Convert.ToChar(ctr);
         if (char.IsControl(ch))
         {
            Console.Write(@"\U{0:X4}    ", ctr);
            charsWritten++;
            if (charsWritten % 6 == 0)
               Console.WriteLine();
         }     
      }  
   }
}
// The example displays the following output to the console:
//       \U0000    \U0001    \U0002    \U0003    \U0004    \U0005
//       \U0006    \U0007    \U0008    \U0009    \U000A    \U000B
//       \U000C    \U000D    \U000E    \U000F    \U0010    \U0011
//       \U0012    \U0013    \U0014    \U0015    \U0016    \U0017
//       \U0018    \U0019    \U001A    \U001B    \U001C    \U001D
//       \U001E    \U001F    \U007F    \U0080    \U0081    \U0082
//       \U0083    \U0084    \U0085    \U0086    \U0087    \U0088
//       \U0089    \U008A    \U008B    \U008C    \U008D    \U008E
//       \U008F    \U0090    \U0091    \U0092    \U0093    \U0094
//       \U0095    \U0096    \U0097    \U0098    \U0099    \U009A
//       \U009B    \U009C    \U009D    \U009E    \U009F

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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