Unable to connect the configured development Web server Visual Studio 2013

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Solution 1

This happened to me.

For me, the reason was a bad IIS config file.

I was able to fix it by deleting the auto-generated IISExpress folder, which is usually located at %userprofile%/Documents, e.g. C:\Users\[you]\Documents\IISExpress.

When I ran the project again, it created a new folder with a valid IIS config file and I could run the debugger.

Solution 2

This happened to me in a Web Site Project. The solution was to close the solution, delete the project's .vs folder and rebuild.

Solution 3

I had to move the solution folder to a new location. ie: from C:\Documents and Settings\David\Desktop\MySolution to C:\SourceCode\MySolution

I tried many of the other suggestions to no avail, but this worked a treat.

Solution 4

you can change the default development server port no in Project(right click)-> Properties-> web->use visual studio web server-> use specific port-> and enter 1000 or any port no.

It will work !! Happy Coding

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Bengi Besçeli
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Bengi Besçeli

Hi, I'm Bengi. I'm 42 years old and I'm a Web Developer since 1998.

Updated on July 12, 2022

Comments

  • Bengi Besçeli
    Bengi Besçeli almost 2 years

    I use

    Visual Studio 2013

    and when I run a project, I get this error :

    Unable to connect the configured development Web server.

    Here is a solution for Visual Studio 2008 and I'm searching through these steps :
    http://www.dotnetspider.com/forum/250134-Unable-connect-ASP-NET-development-Server.aspx
    Here ; Tools->External Tools is used.

    What I have to select in Command in External Tools for Visual Studio 2013 ?

    Thanks in advance.

  • Brabbeldas
    Brabbeldas over 8 years
    Thanks for the answer, a new IISExpress folder is indeed created, it just did not solve my problem.
  • prashantchalise
    prashantchalise over 7 years
    your answer is exactly what I needed. I had a copied project and this was showing error while running. Wonder why would anyone down-vote this comment.