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

System.Net.WebSockets.ClientWebSocketOptions

public sealed class ClientWebSocketOptions
namespace System.Net.WebSockets { public sealed class ClientWebSocketOptions { public X509CertificateCollection ClientCertificates { get; set; } public CookieContainer Cookies { get; set; } public ICredentials Credentials { get; set; } public TimeSpan KeepAliveInterval { get; set; } public IWebProxy Proxy { get; set; } public bool UseDefaultCredentials { get; set; } public void AddSubProtocol(string subProtocol); public void SetBuffer(int receiveBufferSize, int sendBufferSize); public void SetBuffer(int receiveBufferSize, int sendBufferSize, ArraySegment<byte> buffer); public void SetRequestHeader(string headerName, string headerValue); } }