ModernWPF.Internal.LegacyBorderManager._contentWindow_ContentRendered C# (CSharp) Method

        void _contentWindow_ContentRendered(object sender, EventArgs e)
        {
            _resizeGrip = _contentWindow.FindChildInVisualTree<ResizeGrip>();
            // hack to make sure the border is shown after content is shown
            _contentShown = true;
            if (_borderWindow != null)
                _borderWindow.RepositionToContent(new WindowInteropHelper(_contentWindow).Handle, _hideOverride);
        }