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C# 具有外键约束的脚手架实体的实体框架核心问题

c# entity-framework asp.net-core

C# 具有外键约束的脚手架实体的实体框架核心问题,c#,entity-framework,asp.net-core,scaffolding,C#,Entity Framework,Asp.net Core,Scaffolding,Hi I使用EF Core从现有数据库中构建DbContext。结果上下文在建模创建（…）中包含两个相关实体，如下所示： modelBuilder.Entity<MauYdc>(entity => { entity.HasNoKey(); entity.ToTable("MauYDC"); entity.HasIndex(e =>

Hi I使用EF Core从现有数据库中构建DbContext。结果上下文在建模创建（…）中包含两个相关实体，如下所示：

modelBuilder.Entity<MauYdc>(entity =>
            {
                entity.HasNoKey();

                entity.ToTable("MauYDC");

                entity.HasIndex(e => e.Idphieu)
                    .HasName("IX_MauYDC")
                    .IsUnique();

                entity.Property(e => e.Idphieu)
                    .HasColumnName("IDphieu")
                    .HasColumnType("numeric(18, 0)")
                    .ValueGeneratedOnAdd();

                entity.Property(e => e.Manv).HasMaxLength(50);

                entity.Property(e => e.Tenphieu)
                    .HasColumnName("tenphieu")
                    .HasMaxLength(100);
            });

modelBuilder.Entity<MauYdcChiTiet>(entity =>
            {
                entity.HasNoKey();

                entity.ToTable("MauYDC_ChiTiet");

                entity.Property(e => e.Id)
                    .HasColumnName("ID")
                    .HasColumnType("numeric(18, 0)")
                    .ValueGeneratedOnAdd();

                entity.Property(e => e.Idphieu)
                    .HasColumnName("IDphieu")
                    .HasColumnType("numeric(18, 0)");

                entity.Property(e => e.Idthuoc).HasColumnName("idthuoc");

                entity.Property(e => e.Soluong).HasColumnName("soluong");

                entity.HasOne(d => d.IdphieuNavigation)
                    .WithMany()
                    .HasPrincipalKey(p => p.Idphieu)
                    .HasForeignKey(d => d.Idphieu)
                    .OnDelete(DeleteBehavior.Cascade)
                    .HasConstraintName("FK_MauYDC_chitiet_MauYDC");
            });
实体
MauYdcChiTiet

public partial class MauYdcChiTiet
    {
        public decimal? Idphieu { get; set; }
        public int? Idthuoc { get; set; }
        public double? Soluong { get; set; }
        public decimal Id { get; set; }

        public virtual MauYdc IdphieuNavigation { get; set; }
    }
这些都是完全由EF核心生成的，我不去碰它们。但是，在使用与这两个表无关的上下文中的其他表时，我遇到了这个错误

NullReferenceException: Object reference not set to an instance of an object.
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.SetOrAddForeignKey(ForeignKey foreignKey, InternalEntityTypeBuilder principalEntityTypeBuilder, IReadOnlyList<Property> dependentProperties, Key principalKey, string navigationToPrincipalName, Nullable<bool> isRequired, Nullable<ConfigurationSource> configurationSource)
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.CreateForeignKey(InternalEntityTypeBuilder principalEntityTypeBuilder, IReadOnlyList<Property> dependentProperties, Key principalKey, string navigationToPrincipalName, Nullable<bool> isRequired, ConfigurationSource configurationSource)
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.HasRelationship(EntityType targetEntityType, Nullable<MemberIdentity> navigationToTarget, Nullable<MemberIdentity> inverseNavigation, bool setTargetAsPrincipal, ConfigurationSource configurationSource, Nullable<bool> required)
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.HasRelationship(EntityType targetEntityType, MemberInfo navigationProperty, ConfigurationSource configurationSource, bool setTargetAsPrincipal)
Microsoft.EntityFrameworkCore.Metadata.Builders.EntityTypeBuilder<TEntity>.HasOne<TRelatedEntity>(Expression<Func<TEntity, TRelatedEntity>> navigationExpression)
Hl7Map.Infrastructure.SqlServer.NgoaiTru.NgoaiTruContext+<>c.<OnModelCreating>b__322_31(EntityTypeBuilder<MauYdcChiTiet> entity) in NgoaiTruContext.cs
+
                entity.HasOne(d => d.IdphieuNavigation)
Microsoft.EntityFrameworkCore.ModelBuilder.Entity<TEntity>(Action<EntityTypeBuilder<TEntity>> buildAction)
Hl7Map.Infrastructure.SqlServer.NgoaiTru.NgoaiTruContext.OnModelCreating(ModelBuilder modelBuilder) in NgoaiTruContext.cs
+
            modelBuilder.Entity<MauYdcChiTiet>(entity =>
Microsoft.EntityFrameworkCore.Infrastructure.ModelCustomizer.Customize(ModelBuilder modelBuilder, DbContext context)
Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel(DbContext context, IConventionSetBuilder conventionSetBuilder)
Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.GetModel(DbContext context, IConventionSetBuilder conventionSetBuilder)
Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel()
Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model()
Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkServicesBuilder+<>c.<TryAddCoreServices>b__7_3(IServiceProvider p)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, RuntimeResolverContext context)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor<TArgument, TResult>.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor<TArgument, TResult>.VisitCallSite(ServiceCallSite callSite, TArgument argument)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor<TArgument, TResult>.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor<TArgument, TResult>.VisitCallSite(ServiceCallSite callSite, TArgument argument)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine+<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService<T>(IServiceProvider provider)
Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
Microsoft.EntityFrameworkCore.DbContext.get_InternalServiceProvider()
Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
Microsoft.EntityFrameworkCore.DbContext.get_Model()
Microsoft.EntityFrameworkCore.Internal.InternalDbSet<TEntity>.get_EntityType()
Microsoft.EntityFrameworkCore.Internal.InternalDbSet<TEntity>.CheckState()
Microsoft.EntityFrameworkCore.Internal.InternalDbSet<TEntity>.get_EntityQueryable()
Microsoft.EntityFrameworkCore.Internal.InternalDbSet<TEntity>.System.Linq.IQueryable.get_Provider()
System.Linq.Queryable.Where<TSource>(IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
Hl7Map.Manager.Administration.PatientManager.Get(string IdBenhNhan) in PatientManager.cs
+
            var tttn= _myContext.MyOtherTable.Where(ttTiepnhan => ttTiepnhan.MaBn == IdBenhNhan)?.FirstOrDefault();
Hl7Map.Areas.FHIR.Controllers.PatientsController.Get(string idBn) in PatientsController.cs
+
            var pt = await _patientManager.Get(idBn);
lambda_method(Closure , object )
Microsoft.Extensions.Internal.ObjectMethodExecutorAwaitable+Awaiter.GetResult()
Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor+AwaitableObjectResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, object controller, object[] arguments)
System.Threading.Tasks.ValueTask<TResult>.get_Result()
System.Runtime.CompilerServices.ValueTaskAwaiter<TResult>.GetResult()
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask<IActionResult> actionResultValueTask)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

NullReferenceException:对象引用未设置为对象的实例。
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.SetOrAddForeignKey（ForeignKey ForeignKey，InternalEntityTypeBuilder principalEntityTypeBuilder，IReadOnlyList dependentProperties，Key principalKey，string navigationToPrincipalName，可为空，可为空配置源）
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.CreateForeignKey（InternalEntityTypeBuilder principalEntityTypeBuilder、IReadOnlyList dependentProperties、Key principalKey、string navigationToPrincipalName、Nullable isRequired、ConfigurationSource ConfigurationSource）
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.HasRelationship（EntityType targetEntityType，Nullable navigationToTarget，Nullable inverseNavigation，bool setTargetAsPrincipal，ConfigurationSource ConfigurationSource，需要Nullable）
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.HasRelationship（EntityType targetEntityType、MemberInfo navigationProperty、ConfigurationSource ConfigurationSource、bool setTargetAsPrincipal）
Microsoft.EntityFrameworkCore.Metadata.Builders.EntityTypeBuilder.HasOne（表达式导航Expression）
NgoaiTruContext.cs中的Hl7Map.Infrastructure.SqlServer.NgoaiTru.NgoaiTruContext+c.b_uu322_31（EntityTypeBuilder实体）
+
entity.HasOne（d=>d.idphienigation）
Microsoft.EntityFrameworkCore.ModelBuilder.Entity（操作buildAction）
NgoaiTruContext.cs中的Hl7Map.Infrastructure.SqlServer.NgoaiTru.NgoaiTruContext.OnModelCreating（ModelBuilder ModelBuilder）
+
modelBuilder.Entity（Entity=>
Microsoft.EntityFrameworkCore.Infrastructure.ModelCustomizer.Customize（ModelBuilder ModelBuilder，DbContext上下文）
Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel（DbContext上下文，IConventionSetBuilder约定SetBuilder）
Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.GetModel（DbContext上下文，IConventionSetBuilder约定SetBuilder）
Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel（）
Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model（）
Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkServicesBuilder+c.b_u7_u3（IServiceProvider p）
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory（FactoryCallSite FactoryCallSite，RuntimeResolverContext上下文）
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor.VisitCallSiteMain（ServiceCallSite callSite，Target参数）
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache（ServiceCallSite callSite、RuntimeResolverContext上下文、ServiceProviderEngineScope serviceProviderEngine、RuntimeResolverLockType）
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache（ServiceCallSite singletonCallSite，RuntimeResolverContext上下文）
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor.VisitCallSite（ServiceCallSite callSite，Target参数）
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor（ConstructorCallSite ConstructorCallSite，RuntimeResolverContext上下文）
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor.VisitCallSiteMain（ServiceCallSite callSite，Target参数）
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache（ServiceCallSite callSite、RuntimeResolverContext上下文、ServiceProviderEngineScope serviceProviderEngine、RuntimeResolverLockType）
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache（ServiceCallSite singletonCallSite，RuntimeResolverContext上下文）
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor.VisitCallSite（ServiceCallSite callSite，Target参数）
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve（ServiceCallSite callSite，ServiceProviderEngineScope作用域）
Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine+c\u DisplayClass1\u 0.b\u 0（ServiceProviderEngineScope作用域）
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService（类型serviceType，ServiceProviderEngineScope ServiceProviderEngineScope）
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService（类型serviceType）
Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService（IServiceProvider提供程序，类型serviceType）
Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService（IServiceProvider提供程序）
Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies（）
Microsoft.EntityFrameworkCore.DbContext.get\u InternalServiceProvider（）
Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies（）
Microsoft.EntityFrameworkCore.DbContext.get_Model（）
Microsoft.EntityFrameworkCore.Internal.InternalDbSet.get\u EntityType（）
Microsoft.EntityFrameworkCore.Internal.InternalDbSet.CheckState（）
Microsoft.EntityFrameworkCore.Internal.InternalDbSet.get\u EntityQueryable（）
Microsoft.EntityFrameworkCore.Internal.InternalDbSet.System.Linq.IQueryable.get_Provider（）
System.Linq.Queryable.Where（IQueryable源，表达式谓词）
PatientManager.cs中的Hl7Map.Manager.Administration.PatientManager.Get（字符串IdBenhNhan）
+
var tttn=\u myContext.MyOtherTable.Where（ttTi

NullReferenceException: Object reference not set to an instance of an object.
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.SetOrAddForeignKey(ForeignKey foreignKey, InternalEntityTypeBuilder principalEntityTypeBuilder, IReadOnlyList<Property> dependentProperties, Key principalKey, string navigationToPrincipalName, Nullable<bool> isRequired, Nullable<ConfigurationSource> configurationSource)
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.CreateForeignKey(InternalEntityTypeBuilder principalEntityTypeBuilder, IReadOnlyList<Property> dependentProperties, Key principalKey, string navigationToPrincipalName, Nullable<bool> isRequired, ConfigurationSource configurationSource)
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.HasRelationship(EntityType targetEntityType, Nullable<MemberIdentity> navigationToTarget, Nullable<MemberIdentity> inverseNavigation, bool setTargetAsPrincipal, ConfigurationSource configurationSource, Nullable<bool> required)
Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.HasRelationship(EntityType targetEntityType, MemberInfo navigationProperty, ConfigurationSource configurationSource, bool setTargetAsPrincipal)
Microsoft.EntityFrameworkCore.Metadata.Builders.EntityTypeBuilder<TEntity>.HasOne<TRelatedEntity>(Expression<Func<TEntity, TRelatedEntity>> navigationExpression)
Hl7Map.Infrastructure.SqlServer.NgoaiTru.NgoaiTruContext+<>c.<OnModelCreating>b__322_31(EntityTypeBuilder<MauYdcChiTiet> entity) in NgoaiTruContext.cs
+
                entity.HasOne(d => d.IdphieuNavigation)
Microsoft.EntityFrameworkCore.ModelBuilder.Entity<TEntity>(Action<EntityTypeBuilder<TEntity>> buildAction)
Hl7Map.Infrastructure.SqlServer.NgoaiTru.NgoaiTruContext.OnModelCreating(ModelBuilder modelBuilder) in NgoaiTruContext.cs
+
            modelBuilder.Entity<MauYdcChiTiet>(entity =>
Microsoft.EntityFrameworkCore.Infrastructure.ModelCustomizer.Customize(ModelBuilder modelBuilder, DbContext context)
Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel(DbContext context, IConventionSetBuilder conventionSetBuilder)
Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.GetModel(DbContext context, IConventionSetBuilder conventionSetBuilder)
Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel()
Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model()
Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkServicesBuilder+<>c.<TryAddCoreServices>b__7_3(IServiceProvider p)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, RuntimeResolverContext context)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor<TArgument, TResult>.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor<TArgument, TResult>.VisitCallSite(ServiceCallSite callSite, TArgument argument)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor<TArgument, TResult>.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor<TArgument, TResult>.VisitCallSite(ServiceCallSite callSite, TArgument argument)
Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine+<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService<T>(IServiceProvider provider)
Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
Microsoft.EntityFrameworkCore.DbContext.get_InternalServiceProvider()
Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
Microsoft.EntityFrameworkCore.DbContext.get_Model()
Microsoft.EntityFrameworkCore.Internal.InternalDbSet<TEntity>.get_EntityType()
Microsoft.EntityFrameworkCore.Internal.InternalDbSet<TEntity>.CheckState()
Microsoft.EntityFrameworkCore.Internal.InternalDbSet<TEntity>.get_EntityQueryable()
Microsoft.EntityFrameworkCore.Internal.InternalDbSet<TEntity>.System.Linq.IQueryable.get_Provider()
System.Linq.Queryable.Where<TSource>(IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
Hl7Map.Manager.Administration.PatientManager.Get(string IdBenhNhan) in PatientManager.cs
+
            var tttn= _myContext.MyOtherTable.Where(ttTiepnhan => ttTiepnhan.MaBn == IdBenhNhan)?.FirstOrDefault();
Hl7Map.Areas.FHIR.Controllers.PatientsController.Get(string idBn) in PatientsController.cs
+
            var pt = await _patientManager.Get(idBn);
lambda_method(Closure , object )
Microsoft.Extensions.Internal.ObjectMethodExecutorAwaitable+Awaiter.GetResult()
Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor+AwaitableObjectResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, object controller, object[] arguments)
System.Threading.Tasks.ValueTask<TResult>.get_Result()
System.Runtime.CompilerServices.ValueTaskAwaiter<TResult>.GetResult()
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask<IActionResult> actionResultValueTask)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)



services.AddDbContext<MyContext>(options =>
                options.UseLazyLoadingProxies().UseSqlServer(config.GetConnectionString("MyConnectionString"))
            );