[Solved] ASP.Net Parser Error Message: Could not load type

Clearly it seems like there is a difference between web application and a website.

A few hours I decided to try out something created a new web application and created new web forms, then I copied the codes (html and C#) from my website to the web form in the web application but I get tons of errors. One of them is

Server Error in ‘/’ Application.

Parser Error

Parser Error Message: Could not load type ‘quirver_Application.Default’.

The error came from Line 1:

<%@PageLanguage="C#"AutoEventWireup="true"CodeBehind="Default.aspx.cs"Inherits="quirver_Application.Default" %>