c# - Capturing indeterminate state in WPF Threestate Checkbox -

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After

Then, I have a simple threestate checkbox in a WPF application: 

  & lt; Check box checked "checkboxeshecked" unchecked = "checkbox checked" IsThreeState = "True" />   
 Now, I have to do this checkbox whenever its position changes, which is why I am unchecking  checked  and   Events for the same method in the scene. Since this is just a simple example, all I think is doing in the law:  
  Private Zero CheckBox_Checked (Object Sender, RoutedEventArgs e) {MessageBox.Show ("Test") ; }   
 The problem is now that when this check box is checked or unchecked, then it happens when its value changes to an uncertain state. It is clear that I have the  Installing events for checked  and  unchecked , but have lost some event for an uncertain state.  
 What events do I need to use in order to take action when an uncertain state is set?   
 
 
 To do this apparently you need to use the event as much:  
  & lt; Checkbox checked = "CheckBox_Checked" unchecked = "CheckBox_Checked" unsure = "CheckBox_Checked" IsThreeState = "true" />

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