<PackageReference Include="System.Collections.Immutable" Version="11.0.0-rc.3.26522.148" />

System.Collections.Generic.ListPolyfills

static class ListPolyfills
namespace System.Collections.Generic { internal static class ListPolyfills { public sealed class <G>$64B67F85FE78DDA587BDEEBA2FF0A5A2<$T0> { public static class <M>$38DDF2C6076256E5AB048D0D2698159E { } public void AddRange(ReadOnlySpan<$T0> source); } public static void AddRange<T>(this List<T> list, ReadOnlySpan<T> source); } }