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Console.Beep Method (Int32, Int32)

Plays the sound of a beep of a specified frequency and duration through the console speaker.

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

[HostProtectionAttribute(SecurityAction.LinkDemand, UI = true)]
public static void Beep(
	int frequency,
	int duration


Type: System.Int32
The frequency of the beep, ranging from 37 to 32767 hertz.
Type: System.Int32
The duration of the beep measured in milliseconds.


frequency is less than 37 or more than 32767 hertz.


duration is less than or equal to zero.


This method was executed on a server, such as SQL Server, that does not permit access to the console.


   The Beep method is not supported on the 64-bit editions of Windows Vista and Windows XP.


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.

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition Platform Note: The frequency and duration parameters are ignored for these operating systems.

This example demonstrates the Beep method by playing the first few notes of a song through the console speaker.

// This example demonstrates the Console.Beep(Int32, Int32) method
using System;
using System.Threading;

class Sample 
    public static void Main() 
// Declare the first few notes of the song, "Mary Had A Little Lamb".
    Note[] Mary = 
        new Note(Tone.B, Duration.QUARTER),
        new Note(Tone.A, Duration.QUARTER),
        new Note(Tone.GbelowC, Duration.QUARTER),
        new Note(Tone.A, Duration.QUARTER),
        new Note(Tone.B, Duration.QUARTER),
        new Note(Tone.B, Duration.QUARTER),
        new Note(Tone.B, Duration.HALF),
        new Note(Tone.A, Duration.QUARTER),
        new Note(Tone.A, Duration.QUARTER),
        new Note(Tone.A, Duration.HALF),
        new Note(Tone.B, Duration.QUARTER),
        new Note(Tone.D, Duration.QUARTER),
        new Note(Tone.D, Duration.HALF)
// Play the song

// Play the notes in a song.
    protected static void Play(Note[] tune)
    foreach (Note n in tune)
        if (n.NoteTone == Tone.REST)
            Console.Beep((int)n.NoteTone, (int)n.NoteDuration);

// Define the frequencies of notes in an octave, as well as 
// silence (rest).
    protected enum Tone
    REST   = 0,
    GbelowC = 196,
    A      = 220,
    Asharp = 233,
    B      = 247,
    C      = 262,
    Csharp = 277,
    D      = 294,
    Dsharp = 311,
    E      = 330,
    F      = 349,
    Fsharp = 370,
    G      = 392,
    Gsharp = 415, 

// Define the duration of a note in units of milliseconds.
    protected enum Duration
    WHOLE     = 1600,
    HALF      = WHOLE/2,
    QUARTER   = HALF/2,
    EIGHTH    = QUARTER/2,

// Define a note as a frequency (tone) and the amount of 
// time (duration) the note plays.
    protected struct Note
    Tone     toneVal;
    Duration durVal;

// Define a constructor to create a specific note.
    public Note(Tone frequency, Duration time)
        toneVal = frequency;
        durVal  = time;

// Define properties to return the note's tone and duration.
    public Tone NoteTone { get{ return toneVal; } }
    public Duration NoteDuration { get{ return durVal; } }
This example produces the following results:

This example plays the first few notes of "Mary Had A Little Lamb" 
through the console speaker.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.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.