DOTNET_TARGET_FRAMEWORK_VERSION
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Cmake/docs/3.21/prop tgt/dotnet target framework version
DOTNET_TARGET_FRAMEWORK_VERSION
New in version 3.12.
Specify the .NET target framework version.
Used to specify the .NET target framework version for C++/CLI and C#. For example: v4.5
.
This property is only evaluated for Visual Studio Generators VS 2010 and above.
To initialize this variable for all targets set CMAKE_DOTNET_TARGET_FRAMEWORK or CMAKE_DOTNET_TARGET_FRAMEWORK_VERSION. If both are set, the latter is ignored.
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https://cmake.org/cmake/help/v3.21/prop_tgt/DOTNET_TARGET_FRAMEWORK_VERSION.html