C++/CLI , .NET 5.0, TargetFrameworkVersion

Pierre Chatelier 81

Now that .NET 5.0 is released along with VS 2019 16.8, I would like to compile some C++/CLI code with this new version.

But I cannot guess the <TargetFrameworkVersion> value to set in the vcxproj to enable .NET 5.0.

1 answer

Castorix31 85,546 Reputation points

2020-11-12T07:43:59.883+00:00

I installed the SDK 5 and I get :

<TargetFramework>net5.0</TargetFramework>
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Pierre Chatelier 81 Reputation points

2020-11-12T08:01:40.6+00:00

Nope, for a C++/CLI project, there is no <TargetFramework> key, it is <TargetFrameworkVersion>.
And <TargetFrameworkVersion>net5.0</TargetFrameworkVersion> is refused as a syntax error by the project loader.

error : impossible d'évaluer l'expression "[Microsoft.Build.Utilities.ToolLocationHelper]::GetPathToStandardLibraries(.NETFramework, net5.0, '', x64, '', '')". Le format de la chaîne d'entrée est incorrect. C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets

And if I replace <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion> by <TargetFramework>net5.0</TargetFramework>, the compiler will default back to .Net 4.0

Castorix31 85,546 Reputation points

2020-11-12T08:10:39.577+00:00

I just created a C++/CLI like at walkthrough-compiling-a-cpp-program-that-targets-the-clr-in-visual-studio
which targets .NET Core 5 and I get
<TargetFramework>net5.0</TargetFramework>

Pierre Chatelier 81 Reputation points

2020-11-12T08:23:16.393+00:00

I cannot do the same!

39237-no-dotnet50.png

Castorix31 85,546 Reputation points

2020-11-12T08:28:31.633+00:00

Because .NET 5 is not .NET Framework : it is the last version of .NET Core

You can see at : What's new in .NET 5

".NET 5.0 is the next major release of .NET Core following 3.1. We named this new release .NET 5.0 instead of .NET Core 4.0 for two reasons: ..."

Pierre Chatelier 81 Reputation points

2020-11-12T08:38:34.06+00:00

Ok, so I was able to modify the vcxproj by

changing <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion> to <TargetFramework>net5.0</TargetFramework>
2)changing <CLRSupport>true</CLRSupport> to <CLRSupport>NetCore</CLRSupport>

But now there is this error :
error NETSDK1116: C++/CLI projects targeting .NET Core must be dynamic libraries.

So how am I supposed to build a Desktop application using C++/CLI and .Net 5.0 ?

Castorix31 85,546 Reputation points

2020-11-12T09:08:22.347+00:00

I chose : CLR Empty Project (.NET Core)

=> CLR-Core.jpg

and the .vcxproj : vcxproj

Pierre Chatelier 81 Reputation points

2020-11-12T09:24:03.093+00:00

Your vcxproj is not an exe program with a main () entry point, this is a DynamicLibrary, so you might as well being denied to make an exe with it.

The "error NETSDK1116" prevents me from building an executable based on .net 5.0 and C++/CLI

Castorix31 85,546 Reputation points

2020-11-12T10:15:21.683+00:00

Yes.
You can find articles like : Porting a C++/CLI Project to .NET Core
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