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Console.WriteLine Method (Boolean)

Updated: March 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 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 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 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);

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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




March 2011

Replaced the example.

Customer feedback.