<PackageReference Include="Microsoft.Bcl.Cryptography" Version="11.0.0-preview.5.26302.115" />

System.Security.Cryptography.PemFields

struct PemFields
namespace System.Security.Cryptography { internal readonly struct PemFields { public System.Range Location { get; } public System.Range Label { get; } public System.Range Base64Data { get; } public int DecodedDataLength { get; } } }