Visual Studio 2017 加载项目失败

Question

Yesterday, I have finished working on my Android project (c# and Xamarin) on Visual Studio 2017, I closed it. Today, I re-opened the project in order to continue my work but the project is not loading, plus, I am getting an error in the output window saying:

There is a missing project subtype. Subtype: '{EFBA0AD7-5A72-4C68-AF49-83D382785DCF}' is unsupported by this installation.

I have searched up and tried every solution online but nothing worked for me. I tried to delete .suo file , repairing vs.. I do not know what to do.. please help me to solve my problem.

Here's a screenshot of the error

UPDATE I enabled Xamarin for Visual Studio, now the error in the output window is (and the project is still failing to load):

[I:]:                     Found Xamarin.Android 8.0.0.33
[I:sdk]:                  Runtime path: C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\Xamarin\Android
[I:sdk]:                  Framework path: C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\ReferenceAssemblies\Microsoft\Framework\MonoAndroid\v1.0
[I:sdk]:                    Key HKCU\SOFTWARE\Xamarin\VisualStudio\15.0_6c165955\Android\AndroidSdkDirectory found:
    Path contains adb in \platform-tools (C:\Program Files (x86)\Android\android-sdk).
[I:sdk]:                    Key HKCU\SOFTWARE\Xamarin\VisualStudio\15.0_6c165955\Android\AndroidNdkDirectory found:
    Path contains ndk-stack in \. (C:\ProgramData\Microsoft\AndroidNDK64\android-ndk-r13b).
[I:sdk]:                    Key HKCU\SOFTWARE\Xamarin\VisualStudio\15.0_6c165955\Android\JavaSdkDirectory found:
    Path contains jarsigner.exe in \bin (C:\Program Files\Java\jdk1.8.0_131).
[I:]:                     Found Android SDK. API levels: 22, 23, 24, 25

Answer 1

Never worked with XAMARIN before but faced somewhat similar situations with other projects. Here's what you can do :

1. Create a new project

2. Right click on project > Add > Existing Item

3. Browse to the previous projects directory and add all the project files(i mean code files such as .cs)

**4. In winforms, if you add back a form's .cs file, it should automatically load the .designer.cs as well. **

After doing so, you can get back the entire project. There might be a few errors but they are easily fixable. Hope this helps :)

Answer 2

I had a global.json with and sdk for dotnet core that wasn't installed.

Either install the targeted version or update your global.json to fit what you have installed.