Web API项目无法在Visual Studio 2019中加载-错误:'未实现方法或操作' [英] Web API project fails to load in Visual Studio 2019 - error: 'The method or operation is not implemented'

问题描述

我有一个ASP.Net Web API项目无法在Visual Studio 2019中加载.当我尝试从解决方案资源管理器重新加载该项目时，出现错误:

I have a ASP.Net Web API project that is failing to load in Visual Studio 2019. When I try to reload the project from the Solution Explorer I get the error:

该方法或操作未实现

The method or operation is not implemented

任何想法可能是什么原因造成的?

Any ideas what might be causing this?

推荐答案

有点神秘的错误消息-阻止项目加载的实际问题是:

A bit of a cryptic error message - the actual problem preventing the project from loading was:

在该项目的csproj文件中，我有

In the csproj file for the project, section, I had

<UseIIS>true</UseIIS>

和IISUrl指向尚未在IIS上设置的本地站点，例如

and IISUrl pointing to a local site that was not yet set up on IIS, e.g.

<IISUrl>http://localhost:12321</IISUrl>

没有站点绑定到localhost:12321

where there was no site bound to localhost:12321

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