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Console.WriteLine Method (Boolean)

Updated: January 2011

Writes the text representation of the specified Boolean value, followed by the current line terminator, to the standard output stream.

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

[HostProtectionAttribute(SecurityAction.LinkDemand, UI = true)]
public static void WriteLine(
	bool value


Type: System.Boolean

The value to write.


An I/O error occurred.


The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: UI. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

The text representation of value is produced by calling the Boolean.ToString method.

For more information about the line terminator, see the Remarks section of the WriteLine method that takes no parameters.

The following example generates ten random integers and uses the Console.WriteLine(Boolean) method to indicate whether they are even.

using System;

public class Example
   public static void Main()
      // Assign 10 random integers to an array.
      Random rnd = new Random();
      int[] numbers = new int[10]; 
      for (int ctr = 0; ctr <= numbers.GetUpperBound(0); ctr++)
         numbers[ctr] = rnd.Next();

      // Determine whether the numbers are even or odd. 
      foreach (var number in numbers) {
         bool even = (number % 2 == 0);
         Console.WriteLine("Is {0} even:", number);

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0




January 2011

Replaced the example.

Customer feedback.