问题描述
我在此博客帖子，但实际上并没有说明如何启用"它.而且似乎默认情况下未启用它.
I saw it in this blog post, but that doesn't actually say how to "enable" it. And it seems that by default it isn't enabled.
我知道这是一种扩展方法，定义如下: http://msdn.microsoft.com/en-us/library/hh835786(v = vs.108).aspx ，但是我如何获得它呢?如果我键入 Request.CreateErrorResponse ，则编译器无法识别它.
I know it's an extension method, as defined here: http://msdn.microsoft.com/en-us/library/hh835786(v=vs.108).aspx but how do I get access to it? If I type Request.CreateErrorResponse then the compiler doesn't recognize it.
我已经在使用System.Net.Http .
I'm already using System.Net.Http.
推荐答案
您仍在使用预发行版还是发行版?许多扩展直到发行版才出现，并且在早期版本的webapi中不存在.我不确定这是否是其中之一，但这可能是导致您出现问题的原因.
Are you still using pre-release or release version? There were a number of extensions that did not appear until just before the release and did not exist in earlier versions of the webapi release. I am unsure if this was one of them, but it may be what is causing your problem.
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