How to add an event to a UserControl in C#?

Question

I have a UserControl which contains 3 labels. I want to add an event for it, which occurs when the text of one of the labels changed.
I am using Visual Studio 2010

Answer 1

public delegate void TextChangedEventHandler(object sender, EventArgs e);
public event TextChangedEventHandler LabelTextChanged;

// ...

protected void MyTextBox_TextChanged(object sender, EventArgs e)
{
    if (LabelTextChanged != null) {
        LabelTextChanged(this, e);
    }
}