ExternalException.cs

using System.Globalization;
using System.Runtime.Serialization;

namespace System.Runtime.InteropServices
{
    [Serializable]
    [ComVisible(true)]
    public class ExternalException : SystemException
    {
        public virtual int ErrorCode => base.HResult;

        public ExternalException()
            : base(Environment.GetResourceString("Arg_ExternalException"))
        {
            SetErrorCode(-2147467259);
        }

        public ExternalException(string message)
            : base(message)
        {
            SetErrorCode(-2147467259);
        }

        public ExternalException(string message, Exception inner)
            : base(message, inner)
        {
            SetErrorCode(-2147467259);
        }

        public ExternalException(string message, int errorCode)
            : base(message)
        {
            SetErrorCode(errorCode);
        }

        protected ExternalException(SerializationInfo info, StreamingContext context)
            : base(info, context)
        {
        }

        public override string ToString()
        {
            string message = Message;
            string str = GetType().ToString();
            string text = str + " (0x" + base.HResult.ToString("X8", CultureInfo.InvariantCulture) + ")";
            if (!string.IsNullOrEmpty(message))
            {
                text = text + ": " + message;
            }
            Exception innerException = base.InnerException;
            if (innerException != null)
            {
                text = text + " ---> " + innerException.ToString();
            }
            if (StackTrace != null)
            {
                text = text + Environment.NewLine + StackTrace;
            }
            return text;
        }
    }
}