HttpClient

Providing your own HttpClient, supporting Http proxy and customization of user agent headers

We understand that there are cases where you want fine grained control on the Http proxy for instance, which we had not been able to provide you at all (on .NET core), or in a limited way (.NET framework). Also, ASP.NET Core has some very efficient ways of pooling the HttpClient instance, and MSAL.NET clearly did not benefit from it (for details see Use HttpClientFactory to implement resilient HTTP requests)

IMsalHttpClientFactory httpClientFactory = new MyHttpClientFactory();

var pca = PublicClientApplicationBuilder.Create(MsalTestConstants.ClientId) 
                                        .WithHttpClientFactory(httpClientFactory)
                                        .Build();

Dipose guarantee

MSAL will **not **call Dispose() on the HttpClient. The thinking behind this based on https://stackoverflow.com/questions/15705092/do-httpclient-and-httpclienthandler-have-to-be-disposed

.NET Core IHttpClientFactory

It is recommended to adapt ASP.NET Core's IHttpClientFactory to improve scalability in Web App / Web Api scenarios.