protected VirtualizableItemBase(double width, Thickness margin, Thickness viewMargin)
{
this._width = width;
this.Margin = margin;
this.ViewMargin = viewMargin;
this._view.Width = this.Width;
VirtualizableItemBase.UpdateInstanceCount(true);
this.VirtualizableChildren.CollectionChanged += new NotifyCollectionChangedEventHandler(this.VirtualizableChildren_OnCollectionChanged);
}
protected VirtualizableItemBase(double width)
{
this._width = width;
VirtualizableItemBase.UpdateInstanceCount(true);
}