I created a custom control that inherits from TextBox.

I have a ValidateTextBoxEntry method that is called by the Validating event.

Normally, I would use the Property editor in the visual editor to add ValidateTextBoxEntry to the Validating event of each and every instance of the custom control.

Instead, I would rather add a line in the constructor of the custom control to all the event handler automatically, something like this:

```
    public CustomTextBox()
    {
        InitializeComponent();
        this.Validating += 
        new System.ComponentModel.CancelEventHandler(ValidateTextBoxEntry);
   }

```

What is an elegant way of adding a Validating event handler to all instances of a custom control?