<PackageReference Include="System.Configuration.ConfigurationManager" Version="7.0.0-preview.4.22229.4" />

ConfigXmlText

using System.Configuration.Internal; using System.Xml; namespace System.Configuration { internal sealed class ConfigXmlText : XmlText, IConfigErrorInfo { private string _filename; private int _line; int IConfigErrorInfo.LineNumber { get { return _line; } } string IConfigErrorInfo.Filename { get { return _filename; } } public ConfigXmlText(string filename, int line, string strData, XmlDocument doc) : base(strData, doc) { _line = line; _filename = filename; } public override XmlNode CloneNode(bool deep) { XmlNode xmlNode = base.CloneNode(deep); ConfigXmlText configXmlText = xmlNode as ConfigXmlText; if (configXmlText != null) { configXmlText._line = _line; configXmlText._filename = _filename; } return xmlNode; } } }