Software designers may use Expression Blend® to fully customize the XAML code for WPF and Silverlight™ components available within certain DlhSoft libraries. However, if you intend to open some component instances such as those available within our sample applications as design root objects in order to customize their settings using this tool, please be aware that by default they do not have any default sizes and this may lead to generating exceptions in some cases. To workaround this type of issues you need to temporarily set Width and Height properties to fixed values.