问题 In .Net core, we can use IHttpClientFactory to inject and use during runtime. As a developer I no need to worry about the dependency resolution. I need to just specify AddHttpClient() in service collection. Likewise, how can I use IHttpClientFactory in WPF application, .net framework 4.6.1? As there is no Service collection available for WPF application, not getting how to resolve the dependency. 回答1: You can add the Microsoft.Extensions.Http NuGet package to any .NET Standard 2.0-compliant