如何获得（lcd）显示器对角线的实际尺寸，即它是17英寸还是19英寸或其他？

This is useful for me because I have to map objects with a correct dimension on screen; if I'm using a 19" lcd with 1280x1024 resolution and a normal 96dpi setting then in order to map a correct 1-inch square I have to write a xaml like thisThis is useful for me because I have to map obj