UPDATE:
.NET Core 1.1 and later have dropped project.json and returned to .csproj files.
This changes Step 2, but not all that much. The necessary lines are very similar:
<ItemGroup>
<Content Remove="_fonts/OpenSans.ttf" />
<Content Remove="_fonts/OpenSans-Bold.ttf" />
<Content Remove="_fonts/OpenSans-Italic.ttf" />
</ItemGroup>
<ItemGroup>
<EmbeddedResource Include="_fonts/OpenSans.ttf" />
<EmbeddedResource Include="_fonts/OpenSans-Bold.ttf" />
<EmbeddedResource Include="_fonts/OpenSans-Italic.ttf" />
</ItemGroup>
There may be a similar *.tff form; unconfirmed.
Steps 1 and 3 are unchanged.
To use embedded resources in .NET Core 1.0 project do the following:
-
Add your embedded file(s) as usual.
Example: some FONT files on a directory named “_fonts”

-
Modify “project.json” to include the related resources.
In my case:
"buildOptions": { "embed": { "include": [ "_fonts/*.ttf" ] } }, -
Access the embedded resource in code.
var assembly = typeof(MyLibrary.MyClass).GetTypeInfo().Assembly; Stream resource = assembly.GetManifestResourceStream("MyLibrary._fonts.OpenSans.ttf");The key point is to use the right name on
GetManifestResourceStreamcall. You have to use[assembly name].[directory].[file name].