CODEWITHSUNDEEP
c#.netvisual-studio-2015asp.net-core
StackOverflower
StackOverflower

Reputation: 5761

Class library references on Visual Studio 2015

I've added a new Class Library (Package) project to my solution. It's my first experience with a .NET Core (or whatever I'm using, still confused)

My class library contains two references: .NET Framework 4.5.1 and .NET Platform 5.4

I'm trying to import some code from a sample project that uses IPrincipal. For some reason it's saying that it doesn't exist on namespace "System.Security" altohugh I can get it trough intellisense.

What's wrong with my project settings?

Upvotes: 0

Views: 553

Answers (2)

Lex Li
Lex Li

Reputation: 63173

Though the other answer covers some basic concepts, it would require some attention on which classes are available and which are not.

Microsoft temporarily host a web site at http://packagesearch.azurewebsites.net to assist.

If you can find a suitable package for RC1 from there, then you can add it to your project.json file. If not, you will have to conditional compile it to a desktop profile or use other alternatives.

Upvotes: 1

Tseng
Tseng

Reputation: 64150

The new feature of .NET Core and Class Library (Package) is that it targets multiple platform and will compile into multiple assemblies which get automatically packaged into a nuget package.

When your class library targets multiple targets, it will compile to all of them. So if a certain library is only available on full .NET framework but not on .NET Core or other target framework, then you may receive intellisense if your editor is set to .NET 4.5. More information can be found in my other recent answer.

You can switch back and forth with the pull down menu on top left of the coding window, show in the screenshot below.

enter image description here

If you do not want to target a certain framework, you have to remove it's moniker from the project.json file or use preprocessor directives to write platform specific code or libraries/replacements.

.NET Core is heavily modularized and most of only the core modules are referenced in the default project and if you need additional one you need to reference them within the dotnet5.x section.

Basically you have multiple places with "dependencies" in your project.json, a global one where you can add dependencies which are available on all targeted frameworks and one within each "frameworks" section for each of the targets only.

Upvotes: 2

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