Using sublime text 3 with asp.net ?

Question

After installing sublime text 3 and installing Package Control: Install Package Control and Emmet, when typing the rule characters (wildcard characters) and pressing tab, why didn't it insert the full html code? Did I install anything else? and application sublime text 3 with asp.net like? I am using Bootstrap 4.5.3 at: https://getbootstrap.com/docs/4.5/getting-started/download/