Visual Studio 2010 – The type or namespace name 'MyClassLibrary' could not be found

3 במאי 2010

17 תגובות

Visual Studio 2010 – The type or namespace name 'MyClassLibrary' could not be found

I have run across this message in the Beta Edition of Visual Studio 2010 , and I dismissed it as a Beta feature . But now with the release version , for me , that message was a bit out of place .

It seems that the solution , as far as I’m concern , is very simple , change the Target to “.NET Framework 4” and everything is going back to normal.


If you’ll look closely , you’d notice that the default is set to “.NET Framework 4 Client Profile”

The .NET Framework 4 Client Profile is a subset of the .NET Framework 4 that is optimized for client applications. It provides functionality for most client applications, including Windows Presentation Foundation (WPF), Windows Forms, Windows Communication Foundation (WCF), and ClickOnce features. This enables faster deployment and a smaller install package for applications that target the .NET Framework 4 Client Profile.

If you are targeting the .NET Framework 4 Client Profile, you cannot reference an assembly that is not in the .NET Framework 4 Client Profile. Instead you must target the .NET Framework 4. For more information, see Troubleshooting .NET Framework Targeting Errors.

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17 תגובות

  1. Jon Upchurch17 בספטמבר 2010 ב 19:09

    Thanks for the tip, this was driving me nuts!

  2. roy z21 בנובמבר 2010 ב 15:59

    Seems like it solved my problem 🙂

  3. Chris23 במרץ 2011 ב 1:48

    THANK YOU!!!

  4. Jonathan Yong5 באפריל 2011 ב 13:08

    Thank you so much! My head was about to explode with much confusion and frustration!

  5. Nhi27 ביוני 2011 ב 15:36

    you're the man!

  6. Sergio Salazar11 בספטמבר 2011 ב 4:44

    Thank you, gracias, from monterrey!!

  7. Learner13 בספטמבר 2011 ב 15:27

    Awesome man,thanks 🙂

  8. Mia24 בפברואר 2012 ב 18:03

    thanks dude, you saved my life, i was going to kill myself, you're the best

  9. Darshil6 במרץ 2012 ב 10:07

    But where is the main menu? what's the title of main menu to perform this task

  10. venkat 1 ביוני 2012 ב 14:26

    how can change namespace in the middle of development( do not want go each place and replace new name).

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