I did publish to a local file on my computer. When I tried to upload the files Compiled to my hosting using FileZilla, the project uploaded successfully but i get an error on the first page as below: Parser Error Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. Parser Error Message: Could not load the assembly 'App_Web_tuwlsmxq'. Make sure that it is compiled before accessing the page. Source Error: Line 1: <%@ page language="C#" autoeventwireup="true" inherits="welcome, App_Web_tuwlsmxq" %> Line 2: Line 3: <!DOCTYPE html> I don't know why i could face this error, probably related to the fact i did compile locally. For your information, I'm using Hostforlife.eu hosting and i have windows account that supports .NET 4.5. what do i need to change? or what is the best way uploading a ASP.NET website project to a Hostforlife.eu hosting ?