C# 定义新迁移时出现奇怪的错误

每次在package Management console上执行add migration命令以更新数据库架构时，都会出现以下错误：

System.TypeLoadException: Method 'Apply' in type 'Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.RelationalColumnAttributeConvention' from assembly 'Microsoft.EntityFrameworkCore.Relational, Version=1.0.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' does not have an implementation. at Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.RelationalConventionSetBuilder.AddConventions(ConventionSet conventionSet)
at Microsoft.EntityFrameworkCore.Metadata.Conventions.SqlServerConventionSetBuilder.AddConventions(ConventionSet conventionSet)
at Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel(DbContext context, IConventionSetBuilder conventionSetBuilder, IModelValidator validator)
at System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd(TKey key, Func2 valueFactory)
at Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel()
at Microsoft.EntityFrameworkCore.Internal.LazyRef1.get_Value() at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceProvider.<>c__DisplayClass16_0.<RealizeService>b__0(ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitTransient(TransientCallSite transientCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitTransient(TransientCallSite transientCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceProvider.<>c__DisplayClass16_0.<RealizeService>b__0(ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider) at Microsoft.EntityFrameworkCore.Design.MigrationsOperations.AddMigration(String name, String outputDir, String contextType) at Microsoft.EntityFrameworkCore.Tools.Cli.MigrationsAddCommand.Execute(CommonOptions commonOptions, String name, String outputDir, String context, String environment, Action1 reporter)
at Microsoft.EntityFrameworkCore.Tools.Cli.MigrationsAddCommand.<>c__DisplayClass0_0.b__0()
at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
at Microsoft.EntityFrameworkCore.Tools.Cli.Program.Main(String[] args)
Method 'Apply' in type 'Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.RelationalColumnAttributeConvention' from assembly 'Microsoft.EntityFrameworkCore.Relational, Version=1.0.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' does not ha ve an implementation.

System.TypeLoadException:程序集“Microsoft.EntityFrameworkCore.Relational，Version=1.0.1.0，Culture=neutral，PublicKeyToken=adb9793829ddae60”中类型“Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.RelationalColumnAttributeConvention”中的方法“Apply”没有实现。位于Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.RelationalConventionsBuilder.AddConventions（约定集约定集）
位于Microsoft.EntityFrameworkCore.Metadata.Conventions.SqlServerConventionSetBuilder.AddConventions（ConventionSet ConventionSet）
位于Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel（DbContext上下文、IConventionSetBuilder约定SetBuilder、IModelValidator验证器）
位于System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd（TKey，Func2 valueFactory）
在Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel（）中
在Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped（ScopedCallSite ScopedCallSite，ServiceProvider provider）的Microsoft.Extensions.DependencyInjection.ServiceProvider.c_显示类别16_0.b__0（ServiceProvider provider）的Microsoft.EntityFrameworkCore.Internal.LazyRef1.get_Value（）中位于Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T]（IServiceProvider提供程序）的Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitTransient（TransientCallSite TransientCallSite，ServiceProvider提供程序）位于Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor（ConstructorCallSite ConstructorCallSite，ServiceProvider提供程序）的Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitTransient（TransientCallSite TransientCallSite，ServiceProvider提供程序）在Microsoft.Extensions.DependencyInjection.ServiceProvider.c_uu中，在Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService（IServiceProvider提供程序，类型serviceType）中，在Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService中显示Class16_0.b_u0（ServiceProvider提供程序提供程序）[T] 在Microsoft.EntityFrameworkCore.Tools.Cli.MigrationsAddCommand.Execute（CommonOptions CommonOptions，String name，String outputDir，String contextType）的Microsoft.EntityFrameworkCore.Design.MigrationsOperations.AddMigration（字符串名称，String outputDir，String context，String环境，Action1 reporter）中的（IServiceProvider提供程序）
在Microsoft.EntityFrameworkCore.Tools.Cli.MigrationsAddCommand.c__DisplayClass0_0.b__0（）中
位于Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute（字符串[]args）
位于Microsoft.EntityFrameworkCore.Tools.Cli.Program.Main（字符串[]args）
程序集“Microsoft.EntityFrameworkCore.Relational，Version=1.0.1.0，Culture=neutral，PublicKeyToken=adb9793829ddae60”中类型“Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.RelationalColumnAttributeConvention”中的方法“Apply”没有实现。

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<> P>谁以前遇到过这个问题？！< /P>你应该考虑一个更好的标题来描述错误。“奇怪的错误”对以后的用户没有帮助，也不利于搜索。请查看，您是否已将包更新到最新版本？我记得在不匹配的版本上看到过此问题。有关类似的问题和解决方案，请参阅此问题：这是visual studio产生的问题，因为在通过缓存清理恢复dotnet后，一切都很顺利。我只需通过控制台执行此命令：dotnetrestore--no-cache感谢您的帮助=）