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Editorial Team
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Asked: 2026-06-15T03:17:20+00:00

I was adding some workaround code to fix the bug outlined in Is this

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I was adding some workaround code to fix the bug outlined in Is this a bug in DotNet 4 WPF Spell Checking?, (When a WPF TextBox changes Enabled, Visible or ReadOnly states, any SpellCheck custom dictionaries get dropped off until you disable and re-enable SpellCheck) and the simplest fix seemed to be to handle the IsVisibleChanged, IsEnabledChanged, and IsReadOnlyChanged events.

Simple, right? Except there is no IsReadOnlyChanged event. Anybody know why and what the best way to trap a change to IsReadOnly in a WPF TextBox would be?

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1 Answer

  1. Editorial Team

    You can always follow dependency property change with DependencyPropertyDescriptor.AddValueChanged 

    DependencyPropertyDescriptor.FromProperty(TextBoxBase.IsReadOnlyProperty)
                            .AddValueChanged(ctrl, OnReadOnlyChanged)
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