In my VSIX extension I created a DialogWindow-based dialog which contains 2 editable ComboBoxes:

dialog.xaml

<ComboBox Name="HeaderFilter" TextBoxBase.TextChanged="HeaderFilterChangedEventHandler" IsEditable="True"/>
<ComboBox Name="ImplementationFilter" TextBoxBase.TextChanged="ImplementationFilterChangedEventHandler" IsEditable="True"/>

dialog.cs:

public partial class Dialog : DialogWindow
{
    private void HeaderFilterChangedEventHandler(object sender, EventArgs e)
    {
        ImplementationFilter.Text += "1";
    }

    private void ImplementationFilterChangedEventHandler(object sender, EventArgs e)
    {
        HeaderFilter.Text += "2";
    }
}

And I had found that typing in either of these controls doesn’t cause an infinite recursion. For example, typing a single symbol in HeaderFilter causes the following call trace:

HeaderFilterChangedEventHandler()
ImplementationFilterChangedEventHandler()
stop at next HeaderFilterChangedEventHandler call

Which C# feature stops the recursion and when can I rely on it?