To make a pc speaker beep

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C#

Linux

I want to make a pc speaker beep in c# mono linux. so please tell me how it is possible. in windows we use inpout32.dll or inpout64.dll its working fine but in linux we no idea for pc speaker beep.

What I have tried:

i am new i have tried this code in c but its not working

#include "sound.h"
#include <sys/io.h>
 
int read_timer(unsigned int channel)
{
if (channel >2) return(0xffff);
    outb(channel<<6,0x43); //latch
                           //bit shifting has to do with the sound chip.
    return inb(0x40+channel)+(inb(0x40+channel)<<8);
}
 
void sound(long freq)
{
 freq=DIVISOR(freq);
 
//assumes that the channel has been initialized with a 0xb6

 outb(0xb6,0x43);
 outb( (freq&0xff),0x42);
 outb( ((freq>>8)&0xff),0x42);
}
    
 
void soundoff(void)
{
//Turn Sound port off
 outb(inb(0x61) &~3,0x61);
}
 
void soundon(void)
{
//Turn Sound port on
 outb((inb(0x61)| 3), 0x61);
}

int main (){

soundon();
sound(5555);
sleep(3);
soundoff();
return 0;
};