Introduction and Demonstration In ASP.NET, if you have a MasterPage on root and want to use it in different folder's web forms then remember images will not be visible for the web forms exist inside the folder other than root. Because of only, <img> tag generated by development environment has no serverside compatibility. To fix such problem we have to add runat="server" tag with every image used in MasterPage. Download this project for more details. HAVE A HAPPY CODING!
A MasterPage in different folders without Image Loose
USE THE GLOBAL .ASPX FILE IN WEB APPLICATION