在我将现有文件添加到项目后，它碰巧在Visual Studio 2017上。这招对我很管用:

关闭溶液， 转到SolutionFolder\。vs\SolutionName\v15\sqlite3，删除storage.ide 再次打开解决方案

从Visual Studio 2017 15.3.1到15.3.5，出现了解决此问题的新方法。如果您正在使用EditorConfig，则charset=utf8选项会导致这些症状。VS团队已经复制了这个，并表示他们正在努力。

因此，一个修复方法是注释掉.editorconfig文件中的charset=utf8行。

编辑:这应该在VS 15.5被修复。

对我来说，没有一个项目能解决这个问题。我只是在函数中添加了一行新代码，类似于:

int a=0;

通过添加这个，我想我触发了visual studio在原始版本中添加这个功能

我只是重新装填，清理和重建我的作品。

我遇到了这个问题，这是因为我们的DevOps团队要求Azure云设置。在开发时，只需将其从Web.config中删除。

<httpRuntime maxRequestLength="102400" />

    <!--TODO #5 comment out for IIS Express fcnMode goes with httpRunTime above in other environment just in DEV -->
    <!--fcnMode="Disabled"/>-->

This happen often also if you are using a file references to binaries (instead of project references to code in your project), and the compiled binary that you are referencing falls out of sync with the corresponding source code on your machine. This can happen because you downloaded a new version of the binary from source control without the new source code that went with it, or you have a few versions of the binary on your machine and are referencing an old copy, etc. If this is indeed the problem, it's a good reason to use project references as much as it practical.