Xamarin Forms - How To Fix Broken Build? (seems Like Formsmap Broke It)

After installing Xamarin Forms Map, I am now getting this. I've tried to remove everything I added (the init, changes to the Manifest, etc). Gone from a working solution to a broke

Solution 1:

I've ran into the same problem today, which seems to be related to two different dependencies from two C# projects of which one is used/referenced by the other. From what I see, there may be two different versions of the same dependency installed. Most likely, you might need to consolidate your NuGet packages. This might be what the error message is trying to say. One of the duplicated types is Android.Support.V4.View.IViewPropertyAnimatorListenerImplementor which is contained within the two libraries Xamarin.Android.Support.v4 and Xamarin.Android.Support.Compat. At least for my solution this is due to two different versions of the Xamarin.Android.Support.v4 NuGet package, namely versions 25.3.1 and 23.3.0. Because of the dependencies of the Xamarin.Forms NuGet package, I explicitly had to downgrade to version 23.3.0 which seems to solve the problem.