public static SystemSpeaker GetInstance()
{
if (_instnace == null)
{
_instnace = new SystemSpeaker();
}
return(_instnace);
}
static void Main(string[] args)
{
SystemSpeaker speker1 = SystemSpeaker.GetInstance();
SystemSpeaker speker2 = SystemSpeaker.GetInstance();
Console.WriteLine(speker1.GetVolume());
Console.WriteLine(speker2.GetVolume());
speker1.SetVolume(11);
Console.WriteLine(speker1.GetVolume());
Console.WriteLine(speker2.GetVolume());
speker2.SetVolume(16);
Console.WriteLine(speker1.GetVolume());
Console.WriteLine(speker2.GetVolume());
}
