private void RefreshBoundingBox()
{
BoundingBox boundingBox;
boundingBox.Min = new Vector3(this.ActualWidth + this.textOffset.X, this.ActualHeight + this.textOffset.Y, 0);
boundingBox.Max = boundingBox.Min + new Vector3(this.ActualWidth, this.ActualHeight, 0);
this.BoundingBoxRefreshed = true;
}