How to select Random RGB and QB Color using C#.Net?

public Color RandomRGBColor()
{
Random m_Rnd =new Random();
return Color.FromArgb(255, m_Rnd.Next(0, 255), m_Rnd.Next(0, 255), m_Rnd.Next(0, 255));
}

public Color RandomQBColor()
{
int color_num = m_Rnd.Next(0, 15);
return Color.FromArgb(Information.QBColor(color_num) + 0xff000000);
}