visual studio - 'Set as startup project' setting dissapearing -


In this I have a solution with a group of projects 'startup' project is ASP.NET MVC web application I

I have set it as a startup project (by right-clicking on the Explorer Explorer and selecting 'Set as Startup Project'). The title of the project is bold and works fine for some time.

Then I'll edit one of the supporting projects, and I'll come to click on the 'Start debugging' button, and Bang - 'This type of project can not be started' message.

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Try closing the solution, delete the YourSolution.suo file in the root directory of the solution and open it again. / P>