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Unable to start debugging. The Silverlight managed debugging package isn’t installed.

By on April 16th, 2010 . 84 Comments . .Net, Silverlight Tags: , ,

If you installed latest version of Silverlight (Silverlight 4), it may break the your current silverlight development environment. After in the Silverlight 4 installation, if you try to debug any Silverlight 3 project, you will get a message from Visual Studio 2008, saying “Unable to start debugging. The Silverlight managed debugging package isn’t installed.”

Unable to start debugging. The Silverlight managed debugging package isn't installed.

Unable to start debugging. The Silverlight managed debugging package isn't installed.

To fix this error, install the Silverlight Developer Run time. You can get it from here : http://go.microsoft.com/fwlink/?LinkID=188039.

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84 Responses to “Unable to start debugging. The Silverlight managed debugging package isn’t installed.”

  1. Thank so much. This solved my issue.!!!

    Comment by Nithya — April 21, 2010 @ 11:01 pm

  2. Thanks for this idea, that works. But the problem is that the XAML IDE of Visual Studio 2008 shows then the SL4 definition of user controls (ex: UIElement.AllowDrop), whereas we develop with SL3. So that’s not perfect.

    Comment by WolveFred — April 22, 2010 @ 2:04 am

  3. I lost XAML autocomplete after install the Silverlight Developer Run time :(

    Comment by nuno — April 22, 2010 @ 3:47 am

  4. @nuno Hmm thats strange, try Reseting Visual Studio, with devenv /resetsettings in the command prompt and try.

    Comment by Anuraj P — April 23, 2010 @ 4:44 pm

  5. @NITHYA Thanks for the feedback :)

    Comment by Anuraj P — April 23, 2010 @ 5:05 pm

  6. @WolveFred If you are using VS 2010 / WVD Express 2010, you can get the design view.

    Comment by Anuraj P — April 23, 2010 @ 5:07 pm

  7. Download this plug in for Silverlight 4
    http://go.microsoft.com/fwlink/?LinkID=188039

    Comment by Gabriel Brancolini — May 2, 2010 @ 10:37 am

  8. Thank you Gabriel Brancolini :)

    Comment by Anuraj P — May 3, 2010 @ 1:11 am

  9. Thank you very much

    Comment by Surendra — May 3, 2010 @ 3:50 am

  10. thank you

    Comment by Chris — May 3, 2010 @ 12:10 pm

  11. I’ve the same problem but it was not resolved. I’m using vs 2008 sp1
    silverlight 3 sdk and silverlight 4 for the browsers

    Comment by Dotnetmatrix — May 3, 2010 @ 11:48 pm

  12. @Dotnetmatrix – I was also using the same config. Did you installed Silverlight Developer Run time?

    You can download it from :http://go.microsoft.com/fwlink/?LinkID=188039

    Comment by Anuraj P — May 4, 2010 @ 7:02 am

  13. I have been looking for this unswer all afternoon!! Thanks a lot!!
    It worked perfect!!
    thank you, thank you, thank you!!

    Comment by Lina Manjarres — May 5, 2010 @ 3:41 pm

  14. Thank u very much…

    Comment by Vinay — May 6, 2010 @ 7:29 am

  15. You saved my time and effort!

    Thank you so much

    Comment by LEO — May 6, 2010 @ 11:36 pm

  16. @Vinay @LEO @Lina Manjarres Welcome. Thanks for the Feedback :) Happy Coding

    Comment by Anuraj P — May 7, 2010 @ 11:22 pm

  17. good,thanks

    Comment by Kingly — May 14, 2010 @ 7:51 am

  18. Thanks Anuraj (: It solved my problem.I ll write this Turkish to my blog.

    Comment by nuh — May 15, 2010 @ 2:16 am

  19. @Kingly , @nuh Welcome :)

    Comment by Anuraj P — May 15, 2010 @ 8:02 pm

  20. Thanks.

    Comment by Naami Mohammed — May 16, 2010 @ 7:24 am

  21. Thx a million Anuraj, it solved the problem for me!

    Comment by Leo — May 16, 2010 @ 9:29 am

  22. thanx alot man !!!!!!!!!!

    Comment by asad — May 31, 2010 @ 12:56 pm

  23. Tks a lot. I should read this article 1 hour ago.

    Comment by Thiago — June 1, 2010 @ 11:03 pm

  24. Thanks from Brazil dude!! XD

    Comment by Daniel — June 7, 2010 @ 9:45 am

  25. Thank you for help with this problem!

    Comment by Camena — June 8, 2010 @ 12:40 am

  26. Thanks Anuraj!!!!! God Bless

    Comment by Darshan — June 8, 2010 @ 5:03 am

  27. My solution:
    - uninstall SL4 Runtime
    - uninstall SL3 Tools for VS2008 SP1
    - install SL3 Runtime (if you have difficulty to find, go to filehippo.com. On Microsoft page, I always get SL4!)
    - install SL3 Tools for VS2008 SP1 again

    Comment by nuno — June 9, 2010 @ 2:25 am

  28. Thank you very much! My Problem Solved…

    Comment by Navaneethapperumal — June 17, 2010 @ 3:28 am

  29. Thanks you all. Thanks for the comments. @nuno Thanks for the suggestions :)

    Comment by Anuraj P — June 17, 2010 @ 8:35 am

  30. Thanks a lot……….. to Anuraj.P……..
    Bcoz i am struggling for half a day to find the solution….

    Comment by venkatesh — June 29, 2010 @ 3:08 am

  31. Welcome venkatesh :) Keep visiting dotnetthoughts

    Comment by Anuraj P — June 29, 2010 @ 3:34 am

  32. thanks a lot, you just saved me ….

    Comment by Mina — June 29, 2010 @ 5:17 am

  33. Cancel my prior comment, link works fine.

    I tried this and I still have same problem.
    I have ran:

    1.Silverlight3_Tools.exe
    2. Silverlight_sdk.exe
    and now 3. Silverlight_Developer.exe

    All are from Microsoft and I see no change in my problem. I’m running Visual Studio SP1 on Windows XP if that helps.

    Any thoughts?

    Comment by Dan — July 2, 2010 @ 6:10 am

  34. Sorry Dan :( Its working fine for me, in my office machine with same config.

    Comment by Anuraj P — July 3, 2010 @ 4:54 pm

  35. Thanks man , its working perfect !! :)

    Comment by Kaushal — July 5, 2010 @ 7:33 am

  36. Welcome :)

    Comment by Anuraj P — July 5, 2010 @ 7:11 pm

  37. Yeah ! Thanks . It Worked Excellently !

    Many. Many . Thanks.

    Anuraj P.

    Comment by Amit Bhattacharjee — July 8, 2010 @ 8:14 am

  38. Welcome Amit :)

    Comment by Anuraj P — July 8, 2010 @ 1:40 pm

  39. Yeah
    what happened to me was that I didn’t get that silverlight tools 4 had included a runtime for us developers, so I installed SDK, tools for visual studio and a user runtime….
    you have to uninstall the user runtime in that case so that visual studio can find your developer runtime….

    Comment by Anna — July 14, 2010 @ 12:22 pm

  40. Hi,
    Thanks a Lot. it solved my problem.

    Hey i am new to silver light. can any one guide me how to learn silver light easily. any links?

    Comment by Nikunj — July 15, 2010 @ 12:22 am

  41. Welcome :)

    Checkout Silverlight.net site contains a lot of video tutorials.

    Comment by Anuraj P — July 15, 2010 @ 1:27 am

  42. Thank you it saved my time

    Comment by Vivek — July 19, 2010 @ 4:55 am

  43. Thanks a lot :)

    Comment by Andrey — July 21, 2010 @ 9:51 am

  44. Welcome :) Keep visiting dotnetthoughts.net

    Comment by Anuraj P — July 23, 2010 @ 1:08 am

  45. You’re a lifesaver. Muchas gracias!!!

    Comment by fly2hills — August 9, 2010 @ 9:04 am

  46. @fly2hills Welcome :)

    Comment by Anuraj P — August 12, 2010 @ 2:28 am

  47. Thanks..Thanks..Thanks..Thanks..Thanks..Thanks..Thanks..Thanks..Thanks..Thanks..
    I just finding this from 1 hr..installing lot of packages…but didn’t work…
    But after installing this Silverlight_Developer.exe it just work fine……
    U saved my night..thans a looooooooooootttttttttt.

    Comment by Sachin Karche — August 14, 2010 @ 12:58 pm

  48. @Sachin Karche : Your welcome :)

    Comment by Anuraj P — August 15, 2010 @ 11:40 pm

  49. Thank u very much…..

    Comment by Dnyandev — August 19, 2010 @ 5:18 am

  50. @Dnyandev :Welcome :)

    Comment by Anuraj P — August 19, 2010 @ 6:30 am

  51. Thank u very much … It solved my issue

    Comment by Karteek kumar — August 21, 2010 @ 3:49 am

  52. @Karteek kumar : Your welcome :)

    Comment by Anuraj P — August 22, 2010 @ 8:26 am

  53. Thanks a lot :-) its working…

    Comment by Gayathri — August 26, 2010 @ 1:20 am

  54. @Gayathri : Your welcome :)
    Wow you posted the URL as dotnetthoughts :) Interested in writing on dotnetthoughts? Write to me anuraj dot p at dotnetthoughts dot net (no spam)

    Comment by Anuraj P — August 26, 2010 @ 6:31 am

  55. Thank you so much dear. It helps me a lot……..

    Comment by Satish Kumar — August 31, 2010 @ 6:10 am

  56. @Satish Kumar : Welcome :)

    Comment by Anuraj P — August 31, 2010 @ 7:46 am

  57. it is not working for me …
    It is still giving me the eroor like : Unable to start debugging. The Silverlight managed debugging package isn’t installed.
    can’t understand what to do ??

    Comment by Parth — September 6, 2010 @ 11:15 pm

  58. @Parth No idea because its working fine for me. And what about your .Net Framework and Visual Studio? Can you give more details about your environment?

    Comment by Anuraj P — September 12, 2010 @ 5:51 pm

  59. Thank You very much Anuraj for the tip on http://go.microsoft.com/fwlink/?LinkID=188039
    It really helped me very much…

    Comment by Jigar — September 12, 2010 @ 11:33 pm

  60. @Jigar : Welcome :)

    Comment by Anuraj P — September 13, 2010 @ 12:14 am

  61. Thanks Anuraj …your given solution is very helpfull to resolve my debugging problem

    Comment by Raman — September 14, 2010 @ 6:12 am

  62. it’s 100% worked on my PC. Thanks for the great solution.

    Comment by vijay — September 20, 2010 @ 12:34 am

  63. Timely help. Thanks a lot.

    Comment by Rajib — September 25, 2010 @ 2:15 pm

  64. Thanks. It helped me to run my SL3 and SL4 applications side-by-side.

    Comment by Anurag Sindhu — September 28, 2010 @ 1:39 am

  65. Thanks. :)

    Comment by Khalad — October 15, 2010 @ 7:47 pm

  66. Thanks :) . This helped me fix the problem

    Comment by Manikya Mahesh Rali — October 22, 2010 @ 1:09 pm

  67. Thanks you very much its help me

    Comment by Ganesh — October 23, 2010 @ 12:58 am

  68. thanks a lot ……it solved my problem…….now its working

    Comment by Manoj_Dimpu — October 31, 2010 @ 4:02 pm

  69. Thanks a lot………..
    Bcoz i am struggling for half a day to find the solution….

    Comment by Komal Chandra Gupta — November 11, 2010 @ 6:12 am

  70. Thanks you very much Now I am able to work.

    Comment by Ravi Ranjan Sharma — November 16, 2010 @ 11:08 pm

  71. Thank you, this tip solved my problem

    Comment by Nisar — December 27, 2010 @ 3:40 am

  72. We already know that microsoft always keep on updating and releasing the new version.
    This issue cause because of the old release , so many people were facing the same issue after the couple of days working : )

    Thanks for the valuable solution . Its solved my issues and its working fine.

    Comment by garry — January 18, 2011 @ 10:55 am

  73. It solved my problem thanks :)

    Comment by Ali Murtaza — February 1, 2011 @ 4:00 am

  74. Thanks a lot! :D

    Comment by Kimberly-Jo Fenech — February 22, 2011 @ 11:47 am

  75. Thanks dude.

    Comment by rajesh — March 7, 2011 @ 2:02 am

  76. Thanks

    Comment by Awais — April 3, 2011 @ 11:28 am

  77. Thanks man worked like a charm

    Comment by Sarmad — April 21, 2011 @ 10:33 pm

  78. thanks

    Comment by Jitendra — June 1, 2011 @ 11:31 pm

  79. thanks

    Comment by Ashok — June 15, 2011 @ 3:32 pm

  80. Thanks.issue resolved.

    Comment by sachin nikam — July 27, 2011 @ 12:01 am

  81. Thanks a lot…..

    Comment by Rajkumar Shivaratri — September 15, 2011 @ 10:16 pm

  82. Thanks

    Comment by Manish — September 29, 2011 @ 12:35 am

  83. Thanks dude……you are awesome

    Comment by Rich — October 30, 2011 @ 7:28 pm

  84. @Rich : Welcome :)

    Comment by Anuraj P — October 30, 2011 @ 9:55 pm

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