<PackageReference Include="System.Reactive" Version="6.0.2" />

Stubs

static class Stubs
using System.Runtime.CompilerServices; namespace System.Reactive { [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(0)] internal static class Stubs { public static readonly Action Nop = delegate { }; public static readonly Action<Exception> Throw = delegate(Exception ex) { ex.Throw(); }; } }