在网站项目中找不到System.Net.Http

Question

I am working with a web site project within Visual Studio 2015. I usually work with web applications so this type of project is new to me.

This application consist of ASP.NET pages (aspx and .cs code behind files). I wanted to add some code to one of the code behind files that would make use of the HttpClient library, however I cannot seem to add a reference to System.Net.Http. It is not present in the references. I do see that the project is targeting .NET 4.0. Could that be the issue?

Answer 1

You can use NuGet to install this assembly. Just run it in the Package Manager Console(View -> Other Windows -> Package Manager Console):

Install-Package System.Net.Http

UPDATE

If you use .NET 4.0 then you can't install the latest version of System.Net.Http because it doesn't compatible with that framework. You have to use:

Install-Package Microsoft.Net.Http -Version 2.0.20710