I have a WPF form which basically looks like this:
[content shown during normal operation]
Nice solution, I was having a similar problem and I agree that there are cases where it's needed. Here is a minor update that allows you to edit the value to turn IsHidden on and off while designing. I also applied a ScaleTransform instead of setting Width and Height to reduce screen artifacts a bit if control grips etc are displayed and to avoid conflicts if the control being hidden already has Width and Height properties set (assuming that the control doesn't already have a LayoutTransform set on it).
Public Class DesignModeTool
Public Shared ReadOnly IsHiddenProperty As DependencyProperty = DependencyProperty.RegisterAttached( _
"IsHidden", GetType(Boolean), GetType(DesignModeTool), _
New FrameworkPropertyMetadata(False, New PropertyChangedCallback(AddressOf OnIsHiddenChanged)))
Public Shared Sub SetIsHidden(ByVal element As FrameworkElement, ByVal value As Boolean)
element.SetValue(IsHiddenProperty, value)
End Sub
Public Shared Function GetIsHidden(ByVal element As FrameworkElement) As Boolean
Return DirectCast(element.GetValue(IsHiddenProperty), Boolean)
End Function
Private Shared Sub OnIsHiddenChanged(ByVal d As DependencyObject, ByVal e As DependencyPropertyChangedEventArgs)
If System.ComponentModel.DesignerProperties.GetIsInDesignMode(d) AndAlso True.Equals(e.NewValue) Then
With DirectCast(d, FrameworkElement)
.LayoutTransform = New ScaleTransform(0.001, 0.001)
End With
ElseIf System.ComponentModel.DesignerProperties.GetIsInDesignMode(d) AndAlso False.Equals(e.NewValue) Then
With DirectCast(d, FrameworkElement)
.LayoutTransform = Nothing
End With
End If
End Sub
End Class