<PackageReference Include="BouncyCastle.Cryptography" Version="2.3.1" />

Sse41

static class Sse41
using System.Runtime.Intrinsics.X86; namespace Org.BouncyCastle.Runtime.Intrinsics.X86 { internal static class Sse41 { internal static bool IsEnabled => System.Runtime.Intrinsics.X86.Sse41.IsSupported; } }