“Unable to launch the IIS Express Web server.” in Visual Studio

Question

I attempted to run my web service through visual studio. I faced an issue like :

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Microsoft Visual Studio
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Answer 1

I had the same Issue. As @Kautsky Lozano mentions above Another application is using that port.

So [for a Windows OS] just:

• Open Resource Monitor (Task Manager -> Performance -> Open Resource Monitor )
• Click on the Network tab.
• And at TCP Connections find the application that uses the Local Port that IIS Express uses and close it. (it was firefox on my case)