Proxy.Client by Daniel Buckle

<PackageReference Include="Proxy.Client" Version="1.1.6" />

 HttpProxyClient

public sealed class HttpProxyClient : BaseProxyClient
Http connection proxy class. This class implements the Http standard proxy protocol.
public string ProxyPassword { get; }

Proxy Password used to connect to the Proxy Server.

public string ProxyUsername { get; }

Proxy Username used to connect to the Proxy Server.

public HttpProxyClient(string proxyHost, int proxyPort)

Creates a Http proxy client object.

public HttpProxyClient(string proxyHost, int proxyPort, string proxyUsername, string proxyPassword)

Creates a Http proxy client object.