AutoMapper.Extensions.Microsoft.DependencyInjection | To use , with an IServiceCollection instance

Given the following sample classes

Suppose I have 3 object classes in my ASP.Net core 5 project. I am using the package AutoMapper.Extensions.Microsoft.DependencyInjection. The classes are:

I have a .NET Core 3.1 API with the following Nuget packages:

• AutoMapper (10.1.1)
• AutoMapper.Extensions.Microsoft.DependencyInjection (8.1.1)

I'm trying to map a value from an entity to a dto using a ValueResolver and I'm having an exception:

AutoMapperMappingException: Cannot create an instance of type TestAutomapperResolver.Mapping.CustomResolver

Startup.cs

I keep getting this error when I try to Add Razor Pages with Entity Framework Core (CRUD):

How do I go about resolving something like this?

Here is my .csproj file

Properties of type ICollection are not mapped when migrating from Automapper 9 to 10. I am using .NET 5.

I have the following setup:

I installed the AutoMapper.Extensions.Microsoft.DependencyInjection nuget package and I am using .NET Core 3.1. According to the documentation (https://docs.automapper.org/en/stable/Configuration.html) I should be able to add prefixes to my property names. But when I map my two classes the properties with the prefix are null. I have an abstract class with several properties that are extended to my UserDto model I then map the UserDto model to my UserEntity model which does not have an abstract class. My UserEntity model uses the prefix User for every propery, e.g. UserId, UserName, whilst my UserDto just uses Id, Name, etc. I register AutoMapper and add my configuration as follows:

I want to update my packages but I got some errors like this:

The error is:

Error NU1202 Package Microsoft.EntityFrameworkCore.Sqlite 5.0.0-rc.1.20451.13 is not compatible with net50 (.NETFramework,Version=v5.0) / win7-x86. Package Microsoft.EntityFrameworkCore.Sqlite 5.0.0-rc.1.20451.13 supports: netstandard2.1 (.NETStandard,Version=v2.1) API E:...\API\API.csproj 1

API.csproj file:

The app type is a Hosted Blazor web-assembly. And below are the versions of the nuget packages I am using. There is an error that occurs when trying to expand a navigation property that is a many-to-many relationship. The classes are mapped to DTO classes that flattens the middle relationship class.

• .Net core Version="3.1"
• AutoMapper Version="10.0.0"
• AutoMapper.AspNetCore.OData.EFCore Version="2.0.1"
• AutoMapper.Extensions.ExpressionMapping Version="4.0.1"
• AutoMapper.Extensions.Microsoft.DependencyInjection Version="8.0.1"
• Microsoft.AspNetCore.Components.WebAssembly.Server Version="3.2.1"
• Microsoft.AspNetCore.OData Version="7.5.0"

To run this repo, you will need the free version of SQL Server or better

Set the EfCoreAutomapperOdata.Server project as the startup project and navigate to the Courses page (https://localhost:5001/courses) and click on either course. This will throw the following error:

System.InvalidOperationException: No generic method 'Include' on type 'Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions' is compatible with the supplied type arguments and arguments. No type arguments should be provided if the method is non-generic. at System.Linq.Expressions.Expression.FindMethod(Type type, String methodName, Type[] typeArgs, Expression[] args, BindingFlags flags)...

See here - Entity Models and here - Dto Models for class definition

Prject.csproj, provides the following lines: