Further to answer mentioned by @Alexey, this is how I worked it out to embed Aspose libraries as a resource in a .NET Core Web application.

1. Added a folder named Resources under the Solution > Project > Properties folder.

2. Edited the .proj file to add below code:

<!-- Aspose Licence embedded resource include -->
<ItemGroup>
    <EmbeddedResource Include="Properties\Resources\Aspose.Total.NET.lic" />
</ItemGroup>

3. Added registering of the licence in the Program.cs file (that uses top-level statements)

var AsposeLicenceFileName = "Aspose.Total.NET.lic";
var asposeWordsLicence = new Aspose.Words.License();
asposeWordsLicence.SetLicense(AsposeLicenceFileName);

worked out well for the past many months. good luck.