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c# - Why is CheckBox.IsChecked property Nullable<bool>?

in Technique[技术] by (71.8m points)

Why is the IsChecked property of a checkbox control in WPF of type bool? (or Nullable<bool>). I mean how can a checkbox control have the value of null?

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by (71.8m points)

Yes the null value exists and appears as a filled box. It indicates "Not Applicable" to the system.alt text


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