Could not add to solution

[MatteoMeil]

First of all, thanks for the work you did creating this dll and the porting to C# of Pdfium.

I'm trying to add native dll to my project via NuGet but I get this error:

Could not install package 'PdfiumViewer.Native.x86_64.v8-xfa 2018.2.11.249'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.7', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.

I also tried to target to:

• .NETFramework 4.6.1
• .NETFramework 4.6
• .NETFramework 4.5
• .NETFramework 4.0

but still the same issue.

I'm on Ubuntu 17.10 and I'm working with MonoDevelop
How I can fix this?