The good news is that GtkSharp is the only requirements. The bad news is
that GtkSharp requires other libraries:
https://www.nuget.org/packages/GtkSharp/
PS Too fast. It is not the only requirements:
$ find . -type f -exec grep PackageReference {} \;
<PackageReference Include="GtkSharp" Version="3.24.24.34"
/>
<PackageReference Include="NUnit" Version="3.13.2" />
<PackageReference Include="Microsoft.NET.Test.Sdk"
Version="17.0.0" />
<PackageReference Include="NUnit3TestAdapter" Version="4.1.0"
/>
<PackageReference Include="GtkSharp" Version="3.24.24.34"
/>
<PackageReference Include="GtkSharp" Version="3.24.24.34"
/>
<PackageReference Include="GtkSharp" Version="3.24.24.34"
/>
<PackageReference Include="GtkSharp" Version="3.24.24.34"
/>
<PackageReference Include="GtkSharp" Version="3.24.24.34"
/>
<PackageReference Include="GtkSharp" Version="3.24.24.34"
/>
<PackageReference Include="GtkSharp" Version="3.24.24.34"
/>
<PackageReference Include="NGettext" Version="0.6.7" />
<PackageReference Include="SharpZipLib" Version="1.3.3" />
<PackageReference Include="ParagonClipper" Version="6.4.2"
/>
BR,
Andrea