What do Yellow Warning Triangles mean on Dependencies in Visual Studio 2017?

Question

I have just converted my PCL library to a new .Net Standard library and I have some Yellow Warning triangles on my Dependencies shown below:

During the conv

Answer 1

If there is no problem with you to update all NuGet packages that may solve this issue.

Tools menu -> NuGet Package Manager -> Manage Nuget Packages for Solution. When this menu appears, click on the Update tab and click the Update All button.