fail: Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[1]

      An unhandled exception has occurred while executing the request.

      System.InvalidOperationException: Error constructing handler for request of type MediatR.IRequestHandler`2[ProjectsService.Contracts.V1.Requests.CreateProjectRequest,Microsoft.AspNetCore.Http.IResult]. Register your handlers with the container. See the samples in GitHub for examples.

       ---> System.ArgumentException: GenericArguments[0], 'Microsoft.AspNetCore.Http.IResult', on 'T MaxInteger[T](System.Collections.Generic.IEnumerable`1[T])' violates the constraint of type 'T'.

       ---> System.Security.VerificationException: Method System.Linq.Enumerable.MaxInteger: type argument 'Microsoft.AspNetCore.Http.IResult' violates the constraint of type parameter 'T'.

         at System.RuntimeMethodHandle.GetStubIfNeeded(RuntimeMethodHandleInternal method, RuntimeType declaringType, RuntimeType[] methodInstantiation)

         at System.Reflection.RuntimeMethodInfo.MakeGenericMethod(Type[] methodInstantiation)

         --- End of inner exception stack trace ---

         at System.RuntimeType.ValidateGenericArguments(MemberInfo definition, RuntimeType[] genericArguments, Exception e)

         at System.Reflection.RuntimeMethodInfo.MakeGenericMethod(Type[] methodInstantiation)

         at AutoMapper.Internal.TypeDetails.<>c__DisplayClass25_1.<GetPublicNoArgExtensionMethods>b__10(MethodInfo extensionMethod)

         at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()

         at System.Linq.Enumerable.ConcatIterator`1.MoveNext()

         at System.Linq.Enumerable.SelectManyIterator[TSource,TCollection,TResult](IEnumerable`1 source, Func`2 collectionSelector, Func`3 resultSelector)+MoveNext()

         at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()

         at System.Linq.Enumerable.UnionIterator`1.MoveNext()

         at System.Linq.Enumerable.ConcatIterator`1.MoveNext()

         at AutoMapper.Internal.TypeDetails.PossibleNames()

         at AutoMapper.Internal.TypeDetails.GetMember(String name)

         at AutoMapper.Configuration.Conventions.DefaultName.GetMatchingMemberInfo(TypeDetails sourceTypeDetails, Type destType, Type destMemberType, String nameToSearch)

         at AutoMapper.Configuration.Conventions.ParentSourceToDestinationNameMapper.GetMatchingMemberInfo(TypeDetails sourceTypeDetails, Type destType, Type destMemberType, String nameToSearch)

         at AutoMapper.Configuration.Conventions.DefaultMember.MapDestinationPropertyToSource(ProfileMap options, TypeDetails sourceTypeDetails, Type destType, Type destMemberType, String nameToSearch, List`1 resolvers, IMemberConfiguration parent, Boolean isReverseMap)

         at AutoMapper.Configuration.Conventions.MemberConfiguration.MapDestinationPropertyToSource(ProfileMap options, TypeDetails sourceType, Type destType, Type destMemberType, String nameToSearch, List`1 resolvers, Boolean isReverseMap)         at AutoMapper.ProfileMap.MapDestinationPropertyToSource(TypeDetails sourceTypeDetails, Type destType, Type destMemberType, String destMemberName, List`1 members, Boolean reverseNamingConventions)

         at AutoMapper.TypeMap..ctor(Type sourceType, Type destinationType, ProfileMap profile, Boolean isReverseMap)

         at AutoMapper.ProfileMap.BuildTypeMap(IGlobalConfiguration configurationProvider, ITypeMapConfiguration config)         at AutoMapper.ProfileMap.Register(IGlobalConfiguration configurationProvider)

         at AutoMapper.MapperConfiguration.Seal()

         at AutoMapper.MapperConfiguration..ctor(MapperConfigurationExpression configurationExpression)

         at Microsoft.Extensions.DependencyInjection.ServiceCollectionExtensions.<>c.<AddAutoMapperClasses>b__12_2(IServiceProvider sp)

         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context)

         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)

         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)

         at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(Type serviceType)

         at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)

         at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)

         at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)

         at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)

         at Microsoft.Extensions.DependencyInjection.ServiceCollectionExtensions.<>c.<AddAutoMapperClasses>b__12_3(IServiceProvider sp)

         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.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)

         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)

         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitDisposeCache(ServiceCallSite transientCallSite, RuntimeResolverContext context)

         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)

         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)

         at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass2_0.<RealizeService>b__0(ServiceProviderEngineScope scope)

         at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)

         at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)

         at MediatR.ServiceFactoryExtensions.GetInstance[T](ServiceFactory factory)

         at MediatR.Wrappers.HandlerBase.GetHandler[THandler](ServiceFactory factory)

         --- End of inner exception stack trace ---

         at MediatR.Wrappers.HandlerBase.GetHandler[THandler](ServiceFactory factory)

         at MediatR.Wrappers.RequestHandlerWrapperImpl`2.<>c__DisplayClass1_0.<Handle>g__Handler|0()

         at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)

         at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)

         at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)

         at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)

         at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)

         at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)

         at ProjectsService.Api.Utils.MediaterExtensions.<>c__1`1.<<MediatePost>b__1_0>d.MoveNext() in C:\Users\SmartSynk\source\repos\ProjectsService\src\ProjectsService.Api\Utils\MediaterExtensions.cs:line 16

      --- End of stack trace from previous location ---

         at Microsoft.AspNetCore.Http.RequestDelegateFactory.ExecuteTaskResult[T](Task`1 task, HttpContext httpContext)

         at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)

         at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)

         at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)

         at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)

​