The type or namespace name 'xxxx' could not be found (are you missing a using directive or an assembly reference in c#

Asked Apr 20 '15 at 14:42

Active Apr 20 '15 at 14:54

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I have a solution with 5 class libraries. I built these classes with .NET 4.5, but I had to change the version of .NET to 4, so I change all of these class libraries to 4, and now I get this error:

The type or namespace name 'InvoiceRepository' could not be found (are you missing a using directive or an assembly reference?)

All class libraries have the same version of .NET (i.e. 4), but I get the same error. I googled it and I found that NuGet should be removed and should be installed again. I did that but I get the same error.

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best regards

edited Apr 20 '15 at 14:54

cokeman19

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asked Apr 20 '15 at 14:42

Ehsan Akbar

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The assembly containing InvoiceRepository is listed in references? – Alex K. Apr 20 '15 at 14:44
Have you done a clean/rebuild? – christophano Apr 20 '15 at 14:44
where is your class InvoiceRepository ? In which namespace ? Can u put using namespacewhereInvoiceRepositoryIs on top – Ace McCloud Apr 20 '15 at 14:44
@christophano ye i did – Ehsan Akbar Apr 20 '15 at 14:45
@PrasaanthNeelakandan yes i can – Ehsan Akbar Apr 20 '15 at 14:45
possible duplicate of [The type or namespace name could not be found](http://stackoverflow.com/questions/4764978/the-type-or-namespace-name-could-not-be-found) – Josh L. Apr 20 '15 at 14:46
check the project which contain this class and build it individually and go up to check the dependencies hierarchy chain – Sherif Ahmed Apr 20 '15 at 14:46
@PrasaanthNeelakandan i can put it on the top ,but same error – Ehsan Akbar Apr 20 '15 at 14:48
Which NuGet packages are *InvoiceRepository* referencing? Do all NuGet packages target .NET 4.0, or could it be that at least some of them only target .NET 4.5? – Anders Gustafsson Apr 20 '15 at 14:58
Yes exactly one of them has a package in appconfig with .net4.5 – Ehsan Akbar Apr 20 '15 at 14:59
So the *InvoiceRepository* project itself cannot be built right now? Which NuGet package requires .NET 4.5? – Anders Gustafsson Apr 20 '15 at 15:08
@AndersGustafsson no ,it can be built itself ,the ttms library can't be built ,the ttms has a reference to invoicerepository,the docx nuget needs .net4.5 – Ehsan Akbar Apr 20 '15 at 15:10

The type or namespace name 'xxxx' could not be found (are you missing a using directive or an assembly reference in c#

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