I have built a series of event handlers for some custom WPF controls. The event handles format the text displayed when the user enters or leaves a textbox based on the type of data contained (Phone number, zip code, monetary value, etc.)

Right now I have all of the events locally in the C# code directly attached to the xaml. Because I have developed a could controls, this means that the logic is repeated a lot, and if I want to change the program-wide functionality I would have to make changes everywhere the event code is located.

I am sure there is a way to put all of my event handlers in a single class. Can anyone help point me in the correct direction?

I saw this article: Event Handler located in different class than MainWindow But I'm not sure if it directly relates to what I'm doing. I would rather make small changes to the existing logic that I have, as it works, then rewrite everything into commands.

I would essentially like to something like this if possible:

LostFocus="ExpandedTextBoxEvents.TextBox_LostFocus"

It is easy enough to do something like this:

private void TextBoxCurrencyGotFocus(object sender, RoutedEventArgs e)
{
    ExpandedTextBoxEvents.TextBoxCurrencyGotFocus(sender, e);
}
private void TextBoxCurrencyLostFocus(object sender, RoutedEventArgs e)
{
    ExpandedTextBoxEvents.TextBoxCurrencyLostFocus(sender, e);
}

But that is less elegant.