Can't find namespace (ASP.NET MVC 3)

Question

I am currently working on an ASP.NET MVC3 project in Visual Studio. I have a solution set up that contains two seperate projects. I'm new to ASP.NET and I think I'm missing something basic as I cant reference classes out-with the Project that the class trying to reference is located in.

Just to clarify:

I have projectA that contains classA. I have projectB that contains classB.

I type this into classA:

using Solution.projectB.classB

I get an error saying that projectB does not exist.

Answer 1

项目A需要一个对项目B的项目引用，即右键单击项目A，选择添加引用，选择项目，然后选择项目B。

Answer 2

您需要将项目A中的参考添加到项目B中，反之亦然。

Answer 3

You should reference to the namespace and not directly to the class. Try changing your using to:

using Solution.projectB;

Answer 4

.NET can see namespaces across the same project. By default, it cannot see namespaces across different projects in the same solution. You need to add a reference from the top level project "A" to the dependent project "B".

How to: Add a Project Reference to a Visual Studio Web Project

After adding the reference, let Visual Studio do the heavy lifting. Type

classB instanceOfB = new classB(); (assuming there's a default constructor)

Use your mouse to click on classB. Hit the shortcut key CTRL + . . This will open up a drop down giving you the option to automatically import the namespace.

Visual Studio will use syntax coloring to let you know that the process was successful. Alternatively, use CTRL + SHIFT + B to compile the project.