How Do I: Get the name of the event I am in?

Hello:
 
I would like to get the name of the event that I am in. Below is some test code that I am using to try to get this.
What would I need to change so it will give me the event I am in?
private void buttonEvent_Click(object sender, EventArgs e)
{
MessageBox.Show("Where Am I: " + );
}