Xamarin Form: Mobilist.AdvancedTimer.Forms.Plugin restored using .net framework v4.x instead of target framework .net standard version 2.0

Question

Package \'Mobilist.AdvancedTimer.Forms.Plugin 1.0.1\' was restored using \'.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .