I have an existing C# project which is targetted for .net48 and .netstandard2.0. It works fine when I compile it separately. I had to work on moving this project to CMake based project and I am encountering issues of the project containing references to compile tag with .NET Framework. This results in problems where finally, when the build starts for the generated csproj file from CMake, I get into errors mentioning some of the referenced packages are unavailable for .net40. Example CMakeLists.txt file:
```auto
cmake_minimum_required(VERSION 3.29)
project(MyProjectDNC CSharp)
# Add your C# source files
file(GLOB_RECURSE CS_FILES "*.cs")
add_library(MyProjectDNC SHARED ${CS_FILES})
set_target_properties(MyProjectDNC PROPERTIES
DOTNET_TARGET_FRAMEWORK "netstandard2.0"
)
set_target_properties(MyProjectDNC PROPERTIES
COMPILE_DEFINITIONS "TRACE;;NETSTANDARD;NETSTANDARD2_0"
)
set_property(TARGET MyProjectD
PROPERTY VS_PACKAGE_REFERENCES "abc.xyz_23.2.*;Microsoft.Windows.Compatibility_2.0.1;pqr.lmn_23.2.*;Newtonsoft.Json_13.0.1;System.Configuration.ConfigurationManager_4.7.0;System.Threading.Channels_7.0.0"
)
```
Generated csproj file contains the targetframework part correct:
```auto
MyProject netstandard2.0
```
But it contains following strange lines:
```auto
out\build\x64-Debug\CMakeFiles\3.29.3\CompilerIdCSharp\obj\x64\Debug\.NETFramework,Version=v4.7.2.AssemblyAttributes.cs
out\build\x64-Debug\obj\x64\Debug\.NETFramework,Version=v4.0.AssemblyAttributes.cs
```
Following are the error seen in building the complete project:
```auto
C:\Users\abc\source\repos\MyController\src\MyProject\MyProjectDNC\out\build\x64-Debug\MyProjectDNC.csproj : error NU1202: Package abc.xyz 23.2.347.1 is not compatible with net40 (.NETFramework,Version=v4.0). Package abc.xyz 23.2.347.1 supports: net48 (.NETFramework,Version=v4.8)
C:\Users\abc\source\repos\MyController\src\MyProject\MyProjectDNC\out\build\x64-Debug\MyProjectDNC.csproj : error NU1202: Package pqr.lmn 23.2.347.1 is not compatible with net40 (.NETFramework,Version=v4.0). Package pqr.lmn 23.2.347.1 supports: net48 (.NETFramework,Version=v4.8)
```
Any help on this is much appreciated.
---
Looks like a duplicate of [your other topic](https://discourse.cmake.org/t/cmake-for-c-project-with-nuget-package-references/11028).
Anyway, setting [DOTNET\_TARGET\_FRAMEWORK](https://cmake.org/cmake/help/latest/prop_tgt/DOTNET_TARGET_FRAMEWORK.html) might help.
---
I thought my other topic was mainly associated with the nuget package references. Here even after setting nuget package reference and DOTNET\_TARGET\_FRAMEWORK its not working. You can check the CMakeLists.txt file above.
---
Ah, sorry, I haven’t noticed that you have already set the `DOTNET_TARGET_FRAMEWORK` property.
Then maybe setting the “global” [CMAKE\_DOTNET\_TARGET\_FRAMEWORK](https://cmake.org/cmake/help/latest/variable/CMAKE_DOTNET_TARGET_FRAMEWORK.html) value would make a difference (_not very likely though_).
---
I only have .NET 8 installed, so I tried to generate a project targeting that version, here’s [an example](https://github.com/retifrav/MREs/tree/master/discourse-cmake-org/11052).
With that project I get the following `.csproj` generated:
```xml
...
net8.0
...
...
...
```
There are no references to `v4.x` anywhere, and the project builds and runs just fine:
```cmd
> mkdir build
> cd build
> cmake -G "Visual Studio 17 2022" ..
> cmake --build . --config Release
> Release\some.exe
Some: value
```
So I can’t say for sure what could be wrong in your case. Perhaps something isn’t right with the installed .NET SDK/runtime version(s)? Or some of the referenced packages only support “classic” .NET Framework (_or the other way around_).