<PackageReference Include="NETStandard.Library" Version="2.0.1" />

System.Xml.Serialization.SoapAttributeAttribute

namespace System.Xml.Serialization { public class SoapAttributeAttribute : Attribute { public string AttributeName { get; set; } public string DataType { get; set; } public string Namespace { get; set; } public SoapAttributeAttribute(); public SoapAttributeAttribute(string attributeName); } }