I get an error when I try to build

[SplunkyDev]

I am completely new to this, I wanted to test out an IFC file. My main test is to retrieve the metadata of the file imported. I am unable to setup AssimpNet on Visual studio I face this issue. I am unclear on what to do here.

Error MSB3644 The reference assemblies for framework ".NETFramework,Version=v0.0" were not found. To resolve this, install the SDK or Targeting Pack for this framework version or retarget your application to a version of the framework for which you have the SDK or Targeting Pack installed. Note that assemblies will be resolved from the Global Assembly Cache (GAC) and will be used in place of reference assemblies. Therefore your assembly may not be correctly targeted for the framework you intend. AssimpNet C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets 1179