System.MissingMethodException：找不到方法：\'System.Type Microsoft.EntityFrameworkCore.Metadata.ITypeBase.get_ClrType()\'答案

【问题标题】：System.MissingMethodException: Method not found: 'System.Type Microsoft.EntityFrameworkCore.Metadata.ITypeBase.get_ClrType()'System.MissingMethodException：找不到方法：\'System.Type Microsoft.EntityFrameworkCore.Metadata.ITypeBase.get_ClrType()\'
【发布时间】：2022-10-25 22:12:17
【问题描述】：

Good Day Developers,
Please I updated my .Net5 to .Net6 and I have this errors on adding migration:

System.MissingMethodException：找不到方法：'System.Type Microsoft.EntityFrameworkCore.Metadata.ITypeBase.get_ClrType()'。在 Abp.EntityFrameworkCore.AbpDbContext.OnModelCreating(ModelBuilder modelBuilder) 在 Abp.Zero.EntityFrameworkCore.AbpZeroCommonDbContext3.OnModelCreating(ModelBuilder modelBuilder) at Abp.Zero.EntityFrameworkCore.AbpZeroDbContext4.OnModelCreating(ModelBuilder modelBuilder) 在 Microsoft.EntityFrameworkCore.Infrastructure.ModelCustomizer.Customize（ModelBuilder modelBuilder，DbContext 上下文）在 Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel（DbContext 上下文，IConventionSetBuilder 约定SetBuilder，ModelDependencies modelDependencies）在 Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.GetModel（DbContext 上下文，ModelCreationDependencies modelCreationDependencies，布尔设计时间）在 Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel（布尔设计时间）在 Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model() 在 Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkServicesBuilder.<>c.b__8_4(IServiceProvider p) 在 Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite callSite, RuntimeResolverContext context) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor2.VisitCallSite（ServiceCallSite callSite，TArgument 参数）在 Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor（ConstructorCallSite 构造函数CallSite，RuntimeResolverContext 上下文）在 Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument 参数) 在 Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache（ServiceCallSite callSite，RuntimeResolverContext 上下文，ServiceProviderEngineScope serviceProviderEngine，RuntimeResolverLock lockType）在 Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCacMicrosoft.EntityFrameworkCore.Metadata.ITypeBase.get_ClrType()'。

我检查了我所有的 microsoft.entityFrameworkcore 包，它们的版本相同。指向我的代码的这个版本，

 protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);

            modelBuilder.Entity<BinaryObject>(b =>
            {
                b.HasIndex(e => new { e.TenantId });
            });

            modelBuilder.Entity<ChatMessage>(b =>
            {
                b.HasIndex(e => new { e.TenantId, e.UserId, e.ReadState });
                b.HasIndex(e => new { e.TenantId, e.TargetUserId, e.ReadState });
                b.HasIndex(e => new { e.TargetTenantId, e.TargetUserId, e.ReadState });
                b.HasIndex(e => new { e.TargetTenantId, e.UserId, e.ReadState });
            });

            modelBuilder.Entity<Friendship>(b =>
            {
                b.HasIndex(e => new { e.TenantId, e.UserId });
                b.HasIndex(e => new { e.TenantId, e.FriendUserId });
                b.HasIndex(e => new { e.FriendTenantId, e.UserId });
                b.HasIndex(e => new { e.FriendTenantId, e.FriendUserId });
            });

            modelBuilder.Entity<Tenant>(b =>
            {
                b.HasIndex(e => new { e.SubscriptionEndDateUtc });
                b.HasIndex(e => new { e.CreationTime });
            });

            modelBuilder.Entity<SubscriptionPayment>(b =>
            {
                b.HasIndex(e => new { e.Status, e.CreationTime });
                b.HasIndex(e => new { PaymentId = e.ExternalPaymentId, e.Gateway });
            });

            modelBuilder.Entity<SubscriptionPaymentExtensionData>(b =>
            {
                b.HasQueryFilter(m => !m.IsDeleted)
                    .HasIndex(e => new { e.SubscriptionPaymentId, e.Key, e.IsDeleted })
                    .IsUnique();
            });

            modelBuilder.Entity<UserDelegation>(b =>
            {
                b.HasIndex(e => new { e.TenantId, e.SourceUserId });
                b.HasIndex(e => new { e.TenantId, e.TargetUserId });
            });

            modelBuilder.ConfigurePersistedGrantEntity();
        }

有什么我可以实施来解决这个问题。请我需要帮助.

【问题讨论】：

标签： c# asp.net entity-framework-core .net-5 aspnetboilerplate

【解决方案1】：

当您的项目中有EntityFrameworkCore和NetCore的不同版本时会出现此错误，请务必安装与您的NetCore版本兼容的EntityFramework版本。

对于NET 5.0，包是：

Microsoft.EntityFrameworkCore.Design [5.0.10]
Microsoft.EntityFrameworkCore.SqlServer [5.0.10]
Microsoft.EntityFrameworkCore.Tools [5.0.10]

对于NET 6.0，您可以安装：

Microsoft.EntityFrameworkCore.Design [6.0.10]
Microsoft.EntityFrameworkCore.SqlServer [6.0.10]
Microsoft.EntityFrameworkCore.Tools [6.0.10]

【讨论】：