How to change MetroFramework style color for all forms?

Question

.NET

In the main form, I added some settings to change the appearance of the form.
How to update all child forms? those. pass data to other forms.

public main()
        {
            this.InitializeComponent();
            this.StyleManager = metroStyleManager;
        }

        private void mbTheme_SelectedIndexChanged(object sender, EventArgs e)
        {
            switch (mbTheme.SelectedIndex)
            {
                case 0:
                    metroStyleManager.Theme = MetroFramework.MetroThemeStyle.Dark;
                    break;
                case 1:
                    metroStyleManager.Theme = MetroFramework.MetroThemeStyle.Light;
                    break;

            }
        }

        private void mbColor_SelectedIndexChanged(object sender, EventArgs e)
        {
            metroStyleManager.Style = (MetroFramework.MetroColorStyle)Convert.ToUInt32(mbColor.SelectedIndex);
        }