我尝试添加
<PackageReference Include="Microsoft.AspNetCore.Razor.Runtime" Version="2.2.0" />
但是目前没有可用的最新版本2.2.0，与错误不匹配。重建应用程序后，错误仍然相同。
project.csproj：
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netcoreapp3.1</TargetFramework>
<RuntimeIdentifier>linux-x64</RuntimeIdentifier>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="3.1.1" />
<PackageReference Include="Microsoft.AspNetCore.Identity.UI" Version="3.1.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.1">
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.1.1">
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
<PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.1.0" />
<PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="3.1.0" />
</ItemGroup>
</Project>
完整错误：
未处理的异常。 System.IO.FileNotFoundException：无法加载文件或程序集'Microsoft.AspNetCore.Razor.Runtime，Version = 3.1.1.0，文化=中性，PublicKeyToken = adb9793829ddae60'。系统无法找到指定的文件。
文件名：'Microsoft.AspNetCore.Razor.Runtime，版本= 3.1.1.0，文化=中性，PublicKeyToken = adb9793829ddae60'位于System.ModuleHandle.ResolveTypeHandleInternal（RuntimeModule模块，Int32 typeToken，RuntimeTypeHandle [] typeInstantiationContext，的RuntimeTypeHandle [] methodInstantiationContext）System.Reflection.RuntimeModule.ResolveType（Int32 metadataToken，Type [] genericTypeArguments，Type [] genericMethodArguments）System.Reflection.CustomAttribute.FilterCustomAttributeRecord（MetadataTokencaCtorToken，MetadataImport＆作用域，RuntimeModule装饰模块，MetadataToken装饰令牌，RuntimeType属性，FilterType，布尔值mustBeInheritable，ListBuilder
1& derivedAttributes, RuntimeType& attributeType, IRuntimeMethodInfo& ctor, Boolean& ctorHasParameters, Boolean& isVarArg) at System.Reflection.CustomAttribute.AddCustomAttributes(ListBuilder1＆属性，RuntimeModule装饰模块，Int32装饰性MetadataToken，RuntimeType attributeFilterType，布尔值mustBeInheritable，ListBuilder1 derivedAttributes) at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType) at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType) at System.Reflection.RuntimeAssembly.GetCustomAttributes(Type attributeType, Boolean inherit) at System.Attribute.GetCustomAttributes(Assembly element, Type attributeType, Boolean inherit) at System.Attribute.GetCustomAttribute(Assembly element, Type attributeType, Boolean inherit) at System.Reflection.CustomAttributeExtensions.GetCustomAttribute[T](Assembly element) at Microsoft.AspNetCore.Mvc.ApplicationParts.ApplicationPartFactory.GetApplicationPartFactory(Assembly assembly) at Microsoft.AspNetCore.Mvc.ApplicationParts.ApplicationPartManager.PopulateDefaultParts(String entryAssemblyName) at Microsoft.Extensions.DependencyInjection.MvcCoreServiceCollectionExtensions.GetApplicationPartManager(IServiceCollection services) at Microsoft.Extensions.DependencyInjection.MvcCoreServiceCollectionExtensions.AddMvcCore(IServiceCollection services) at Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddControllersCore(IServiceCollection services) at Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddControllersWithViewsCore(IServiceCollection services) at Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddControllersWithViews(IServiceCollection services) at Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddMvc(IServiceCollection services) at Microsoft.AspNetCore.Identity.IdentityBuilderUIExtensions.AddRelatedParts(IdentityBuilder builder) at Microsoft.AspNetCore.Identity.IdentityBuilderUIExtensions.AddDefaultUI(IdentityBuilder builder) at Microsoft.Extensions.DependencyInjection.IdentityServiceCollectionUIExtensions.AddDefaultIdentity[TUser](IServiceCollection services, Action1 configureOptions）位于Microsoft.Extensions.DependencyInjection.IdentityServiceCollectionUIExtensions.AddDefaultIdentity [TUser]（IServiceCollection服务）在pieshop.Startup.ConfigureServices（IServiceCollection）服务）在/home/juan/code/web-projects/pieshop/src/Startup.cs:line中36在System.RuntimeMethodHandle.InvokeMethod（对象目标，Object []参数，签名sig，布尔构造函数，布尔wrapExceptions）System.Reflection.RuntimeMethodInfo.Invoke（对象obj，BindingFlagsinvokeAttr，活页夹活页夹，Object []参数，CultureInfo文化）在Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.InvokeCore（Object例如IServiceCollection服务）Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder。<> c__DisplayClass9_0.g__Startup | 0（IServiceCollectionserviceCollection）Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.Invoke（对象例如IServiceCollection服务）Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder。<> c__DisplayClass8_0.b__0（IServiceCollection服务）Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.UseStartup（TypestartupType，HostBuilderContext上下文，IServiceCollection服务）在Microsoft.AspNetCore.Hosting.GenericWebHostBuilder。<> c__DisplayClass12_0.b__0（HostBuilderContext上下文，IServiceCollection服务）Microsoft.Extensions.Hosting.HostBuilder.CreateServiceProvider（）在Microsoft.Extensions.Hosting.HostBuilder.Build（）在pieshop.Program.Main（String [] args）在/home/juan/code/web-projects/pieshop/src/Program.cs:line 10
Startup.cs的第36行：
services.AddDefaultIdentity<IdentityUser>()
.AddEntityFrameworkStores<AppDbContext>();
我注意到了同一件事，请查看该框架的ms更新，几天前有更新，期望已安装了较新的nuget软件包。
您遇到的问题是nuget软件包与您的SDk不匹配，至少这就是我所拥有的。在执行Windows更新并安装新的Core Runtime之后，Version = 3.1.1.0一切正常[]