Umbraco 7: Could not load type Umbraco.Web.UmbracoApplication

Question

1. Created an ASP.NET empty web application in Visual Studio
2. Installed Umbraco 7.1.5 via NuGet Package Manager
3. When asked to overwrite the web.config file,

Answer 1

The solution, when I encountered it after installing Umbraco 7.2.12 into an existing but empty project, was to change the assembly name and default namespace from "Umbraco" to the name of the (startup-)project eg. "Website".

In Visual Studio 2017 (applies to many other versions of VS), you can do it like this:

1. Select your project
2. Select Properties
3. Select tab Application
4. Change Assembly name and Default namespace
5. Save ... and wait
6. Run