IWebProxyFactoryUseProxyAsyncT - метод

ValueTask<T> UseProxyAsync<T>(
	HttpClient httpClient = null,
	Func<T, CancellationToken, ValueTask> modifyProxyFuncAsync = null,
	CancellationToken cancellationToken = default
)
where T : class, IWebProxy

Function UseProxyAsync(Of T As {Class, IWebProxy}) ( 
	Optional httpClient As HttpClient = Nothing,
	Optional modifyProxyFuncAsync As Func(Of T, CancellationToken, ValueTask) = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As ValueTask(Of T)

generic<typename T>
where T : ref class, IWebProxy
ValueTask<T> UseProxyAsync(
	HttpClient^ httpClient = nullptr, 
	Func<T, CancellationToken, ValueTask>^ modifyProxyFuncAsync = nullptr, 
	CancellationToken cancellationToken = CancellationToken()
)

abstract UseProxyAsync : 
        ?httpClient : HttpClient * 
        ?modifyProxyFuncAsync : Func<'T, CancellationToken, ValueTask> * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _httpClient = defaultArg httpClient null
        let _modifyProxyFuncAsync = defaultArg modifyProxyFuncAsync null
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> ValueTask<'T>  when 'T : not struct and IWebProxy