How do I prevent the nodes from being rotated?

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Prevent Node rotation

This can be done by raising the Diagram.Model.EventSink.RotationChanging event and cancelling the operation.

Below is the sample code snippet for your reference.

this.diagram1.Model.EventSink.RotationChanging += new RotationChangingEventHandler(EventSink_RotationChanging);
void EventSink_RotationChanging(RotationChangingEventArgs evtArgs)
{
evtArgs.Cancel = true;
}

Me.diagram1.Model.EventSink.RotationChanging += New RotationChangingEventHandler(EventSink_RotationChanging)
Private Sub EventSink_RotationChanging(ByVal evtArgs As RotationChangingEventArgs)
evtArgs.Cancel = True
End Sub

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How do I prevent the nodes from being rotated?

Prevent Node rotation

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