Xamarin.Forms.Lottie 2.5.4 is not Working

I am install Xamarin.Forms.Lottie 2.5.4 nuget, i use code from [sample ](https://github.com/martijn00/LottieXamarin/tree/develop/Samples/Forms "sample ") but when i run then it gives error

Could not resolve type with token 0100007c (from typeref, class/assembly System.Runtime.CompilerServices.TupleElementNamesAttribute, netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51)

Now, what can do ???

I am using VS2017 Version15.2 (26430.14) (community)

Pls Help me