Directive Syntax
Directives are instructions used to specify settings (related to how a page should render and processed) used by the page and user control compilers when they process ASP.NET Web Forms page (.aspx) and user control (.ascx) files. These are the essential part of every ASP.NET Page or Control.
Directives can be located anywhere in an .aspx or .ascx file, but the standard practice is to include them at the beginning of the file (The advantage of using them at the top or the beginning of the file is that we …