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            public static void Beep() {

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                Play(@"\Windows\Voicbeep");

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    /// On the screen background or on a dividing line between windows (same as HTNOWHERE, except that the DefWindowProc function produces a system beep to indicate an error).

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    Beep                = 0x00000001,

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static extern bool MessageBeep(beepType uType);

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Private Shared Function MessageBeep(ByVal uType As beepType) As Boolean

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method public static pinvokeimpl boolean MessageBeep(var uType as integer)

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With the enum beepType you get intellisense when you type "beep." and you can then select the kind of beep you want. For dylan.NET, use the fields containing the integer values inside the WinSnd class of dnu.dll at http://dylandotnetapps.codeplex.com/

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    /// Enum type that enables intellisense on the private <see cref="Beep"/> method.

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    /// Used by the public Beep <see cref="Beep"/></remarks>

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    public enum beepType : uint

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        /// A simple windows beep

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        SimpleBeep  = 0xFFFFFFFF,

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        /// A standard windows OK beep

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        /// A standard windows Question beep

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        /// A standard windows Exclamation beep

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        /// A standard windows Asterisk beep

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    private static extern bool MessageBeep(uint type);

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    /// Method to call interop for system beep

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    /// <remarks>Calls Windows to make computer beep</remarks>

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    /// <param name="type">The kind of beep you would like to hear</param>

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    public static void beep(beepType type)

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        MessageBeep((uint)type);

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///////////////// ANOTHER EXAMPLE same as the above but shows all beeps.

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        public enum beepType

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            /// A simple windows beep

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            SimpleBeep  = -1,

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            /// A standard windows OK beep

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            /// A standard windows Question beep

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            /// A standard windows Exclamation beep

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            /// A standard windows Asterisk beep

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        private static extern bool MessageBeep(uint type);

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            Class1.beep(beepType.Asterisk);

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            Class1.beep(beepType.Exclamation);

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            Class1.beep(beepType.OK);

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            Class1.beep(beepType.Question);

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            Class1.beep(beepType.SimpleBeep);

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        public static void beep(beepType type)

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            MessageBeep((uint)type);

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Article http://msdn.microsoft.com/msdnmag/issues/03/07/NET/ ("Calling Win32 DLLs in C# with P/Invoke") gives a helpful wrapper class for MessageBeep.

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System.Console.Beep

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Documentation

[MessageBeep] on MSDN

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    FILE_DEVICE_BEEP = 0x01,

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    FILE_DEVICE_BEEP = &H1