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

System.Net.WebSockets.ClientWebSocketOptions

public sealed class ClientWebSocketOptions

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)