<PackageReference Include="NETStandard.Library" Version="2.0.0" />

System.Net.WebHeaderCollection

namespace System.Net { public class WebHeaderCollection : NameValueCollection, ISerializable { public string this[HttpRequestHeader header] { get; set; } public string this[HttpResponseHeader header] { get; set; } public WebHeaderCollection(); protected WebHeaderCollection(SerializationInfo serializationInfo, StreamingContext streamingContext); public void Add(HttpRequestHeader header, string value); public void Add(HttpResponseHeader header, string value); public void Add(string header); protected void AddWithoutValidate(string headerName, string headerValue); public static bool IsRestricted(string headerName); public static bool IsRestricted(string headerName, bool response); public void Remove(HttpRequestHeader header); public void Remove(HttpResponseHeader header); public void Set(HttpRequestHeader header, string value); public void Set(HttpResponseHeader header, string value); public byte[] ToByteArray(); } }