您可以参考：  https：//forums.xamarin.com/讨论/ 59017 /无资源发现 - 即百搭的给出的名称管理主题程序兼容性光

Hi, I have a trouble with creating xamarin project. When I do this, Vs shows a lot of errors. Even though I still can run the app, I don't think this is normal to have them in a blank project. I tried to repair vs and reinstall packages, but nothing changed. Can someone help me? Here's the full list of errors.

Error    CS0115    'MainActivity.OnCreate(Bundle)': no suitable method found to override    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\MainActivity.cs    15    Active
Warning        Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light.DarkActionBar'.    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\Resources\values\styles.xml    2    
Warning        Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light.Dialog'.    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\Resources\values\styles.xml    4    
Warning        No resource found that matches the given name: attr 'colorAccent'.    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\Resources\values\styles.xml    3    
Warning        No resource found that matches the given name: attr 'colorAccent'.    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\Resources\values\styles.xml    4    
Warning        No resource found that matches the given name: attr 'colorPrimary'.    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\Resources\values\styles.xml    2    
Warning        No resource found that matches the given name: attr 'colorPrimaryDark'.    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\Resources\values\styles.xml    2    
Warning        No resource found that matches the given name: attr 'windowActionBar'.    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\Resources\values\styles.xml    2    
Warning        No resource found that matches the given name: attr 'windowActionModeOverlay'.    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\Resources\values\styles.xml    4    
Warning        No resource found that matches the given name: attr 'windowNoTitle'.    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\Resources\values\styles.xml    2    
Error    CS0103    The name 'InitializeComponent' does not exist in the current context    App1.Android    c:\users\mihail\source\repos\App1\App1\App1\MainPage.xaml.cs    14    Active
Error    CS0103    The name 'LoadApplication' does not exist in the current context    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\MainActivity.cs    23    Active
Error    CS0103    The name 'TabLayoutResource' does not exist in the current context    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\MainActivity.cs    17    Active
Error    CS0103    The name 'ToolbarResource' does not exist in the current context    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\MainActivity.cs    18    Active
Error        The type 'ContentPage' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built.    App1.Android    c:\users\mihail\source\repos\App1\App1\App1\MainPage.xaml    2    
Error        The type 'Label' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built.    App1.Android    c:\users\mihail\source\repos\App1\App1\App1\MainPage.xaml    7    
Error    CS0246    The type or namespace name 'ContentPage' could not be found (are you missing a using directive or an assembly reference?)    App1.Android    c:\users\mihail\source\repos\App1\App1\App1\MainPage.xaml.cs    10    Active
Error    CS0234    The type or namespace name 'Forms' does not exist in the namespace 'Xamarin' (are you missing an assembly reference?)    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\MainActivity.cs    13    Active
Error    CS0234    The type or namespace name 'Forms' does not exist in the namespace 'Xamarin' (are you missing an assembly reference?)    App1.Android    c:\users\mihail\source\repos\App1\App1\App1\MainPage.xaml.cs    6    Active
Error    CS0234    The type or namespace name 'Forms' does not exist in the namespace 'Xamarin' (are you missing an assembly reference?)    App1.Android    c:\users\mihail\source\repos\App1\App1\App1.Android\MainActivity.cs    22    Active

You could refer to this: https://forums.xamarin.com/discussion/59017/no-resource-found-that-matches-the-given-name-theme-appcompat-light