Signature (parameter 1) of EventHandler "OnFilterTextChanged" doesn't match the event type

Control:

public delegate void SelectedTextChangedEventHandler(object sender, TextChangedEventArgs args);
public event SelectedTextChangedEventHandler TextChanged;

XAML:
<controls:EntryEx TextChanged="OnFilterTextChanged"/>

Code:

private void OnFilterTextChanged(object sender, EventArgs args) // Error
private void OnFilterTextChanged(object sender, TextChangedEventArgs args) // OK