<PackageReference Include="NETStandard.Library" Version="2.0.3" />

System.Xml.UniqueId

public class UniqueId
namespace System.Xml { public class UniqueId { public int CharArrayLength { get; } public bool IsGuid { get; } public UniqueId(); public UniqueId(byte[] guid); public UniqueId(byte[] guid, int offset); public UniqueId(char[] chars, int offset, int count); public UniqueId(Guid guid); public UniqueId(string value); public static bool operator ==(UniqueId id1, UniqueId id2); public static bool operator !=(UniqueId id1, UniqueId id2); public int ToCharArray(char[] chars, int offset); public bool TryGetGuid(byte[] buffer, int offset); public bool TryGetGuid(out Guid guid); } }