public Out123(string pluginFolder = "./plugins")
{
System.Environment.SetEnvironmentVariable("MPG123_MODDIR", pluginFolder);
handle = Out123NativeMethods.New();
if (handle == IntPtr.Zero)
{
System.Environment.SetEnvironmentVariable("MPG123_BINDIR", ""); //remove env variable
throw new Out123.ErrorException("Unable to initialize lib Out123");
}
}