'CarouselView' exists in both 'Xamarin.Forms.CarouselView' and 'Xamarin.Forms.Core'

I have issue with carouselview. after installing CarouselView from NuGet Manager giving me below error.
The type 'CarouselView' exists in both 'Xamarin.Forms.CarouselView, Version=1.0.0.0' and 'Xamarin.Forms.Core, Version=2.0.0.0