The type or namespace name 'X' could not be found

Question

I have a CustomerOrderContext class in CustomerOrder.Data project in my solution. In another project, CustomerOrder.App, I have CustomerVM class. In this class I'm creating a CustomerOrderContext instance. But I get this following error:

Error 2 The type or namespace name 'CustomerOrderContext' could not be found (are you missing a using directive or an assembly reference?)

I have changed Build Actions of both projects to Page and then back to None and I have started to get this error. I have this line in CustomerVM:

using CustomerOrder.Data;

so I guess I shouldn't get this error. CustomerOrder.Data is also in References list of CustomerOrder.App. Can you tell me how I can fix this problem? Thanks.

@MoezRebai I'm getting a lot of errors. I think I'm using many framework 4.5 libraries. — jason, Jul 11 '14 at 07:19
Are you sure CustomerOrderContext is in namespace CustomerOrder.Data? Reference to CustomerOrder.Data means assembly named CustomerOrder.Data, but given your "using CustomerOrder.Data", said assembly should contain namespace with the same name as well. Use Object Browser to check this. — user3613916, Jul 11 '14 at 07:43

score 1 · Accepted Answer · answered Jul 11 '14 at 07:49

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The issue is solved when I created new project, copied & pasted all classes.

answered Jul 11 '14 at 07:49

jason

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Charlie · Answer 2 · 2014-07-11T07:12:19.330

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you need to add Reference of that project (.dll) in your project.

You will find it when you right click your solution and add the (.dll) of other project in debug folder. To access the class you must have same namespace

and Check that both projects follow the same .Net Framework

edited Jul 11 '14 at 07:12

answered Jul 11 '14 at 07:03

Charlie

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Check that both projects follow the same .Net Framework – Charlie Jul 11 '14 at 07:12

score 0 · Answer 3 · answered Jul 11 '14 at 07:07

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be sure that CurstomerOrderContext class is marked as Public and not Internal.

answered Jul 11 '14 at 07:07

Livio F.

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It is public and not internal. – jason Jul 11 '14 at 07:07

score 0 · Answer 4 · edited May 23 '17 at 12:20

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Can you check if the framework versions are compatible? See https://stackoverflow.com/a/4286625/2478357.

Also, if you use Entity Framework (and CustomerOrder.Data uses EF), check if your CustomerOrder.App has a reference to the Entity framework dll. (This also applies to other imported dll's..)

edited May 23 '17 at 12:20

Community

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answered Jul 11 '14 at 07:12

Loetn

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The type or namespace name 'X' could not be found

4 Answers4