ErrorMsgContent
using System;
namespace Org.BouncyCastle.Asn1.Cmp
{
    public class ErrorMsgContent : Asn1Encodable
    {
        private readonly PkiStatusInfo m_pkiStatusInfo;
        private readonly DerInteger m_errorCode;
        private readonly PkiFreeText m_errorDetails;
        public virtual PkiStatusInfo PkiStatusInfo => m_pkiStatusInfo;
        public virtual DerInteger ErrorCode => m_errorCode;
        public virtual PkiFreeText ErrorDetails => m_errorDetails;
        public static ErrorMsgContent GetInstance(object obj)
        {
            if (obj == null)
                return null;
            ErrorMsgContent errorMsgContent = obj as ErrorMsgContent;
            if (errorMsgContent != null)
                return errorMsgContent;
            return new ErrorMsgContent(Asn1Sequence.GetInstance(obj));
        }
        public static ErrorMsgContent GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
        {
            return new ErrorMsgContent(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
        }
        private ErrorMsgContent(Asn1Sequence seq)
        {
            m_pkiStatusInfo = PkiStatusInfo.GetInstance(seq[0]);
            for (int i = 1; i < seq.Count; i++) {
                Asn1Encodable asn1Encodable = seq[i];
                if (asn1Encodable is DerInteger)
                    m_errorCode = DerInteger.GetInstance(asn1Encodable);
                else
                    m_errorDetails = PkiFreeText.GetInstance(asn1Encodable);
            }
        }
        public ErrorMsgContent(PkiStatusInfo pkiStatusInfo)
            : this(pkiStatusInfo, null, null)
        {
        }
        public ErrorMsgContent(PkiStatusInfo pkiStatusInfo, DerInteger errorCode, PkiFreeText errorDetails)
        {
            if (pkiStatusInfo == null)
                throw new ArgumentNullException("pkiStatusInfo");
            m_pkiStatusInfo = pkiStatusInfo;
            m_errorCode = errorCode;
            m_errorDetails = errorDetails;
        }
        public override Asn1Object ToAsn1Object()
        {
            Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(3);
            asn1EncodableVector.Add(m_pkiStatusInfo);
            asn1EncodableVector.AddOptional(m_errorCode, m_errorDetails);
            return new DerSequence(asn1EncodableVector);
        }
    }
}