In a very crude way, you can just call the original event handler just like any method. Foe e.g. I am calling the button clicked event also from checkbox changed:
private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show("Button Clicked!!!");
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
button1_Click(sender, e);
}
However, a better way would be look back and see what you actually want. And perhaps you can implement a new common custom event which can fired by multiple controls.