<PackageReference Include="NETStandard.Library" Version="2.0.0-preview2-25401-01" />

System.Net.WebException

namespace System.Net { public class WebException : InvalidOperationException, ISerializable { public WebResponse Response { get; } public WebExceptionStatus Status { get; } public WebException(); protected WebException(SerializationInfo serializationInfo, StreamingContext streamingContext); public WebException(string message); public WebException(string message, Exception innerException); public WebException(string message, Exception innerException, WebExceptionStatus status, WebResponse response); public WebException(string message, WebExceptionStatus status); } }