ExtraProperties ignored in AutoMapper's ProjectTo<>

[antonGritsenko]

Is there an existing issue for this?

• [X] I have searched the existing issues

Description

ExtraProperties ignored if ProjectTo<> method of AutoMapper was used.

Reproduction Steps

1. Add any extra property to IdentityUser
2. Rune pseudo code:

   
   public UsersController(IReadOnlyRepository<IdentityUser> repo, IMapper mapper)
   {

}

public async Task<IQueryable> Get() { var queryCustom = (await _dataSet.GetDbSetAsync()).Where(t => t.Surname == "Dow"); var resultNotMapped = queryCustom.ToList(); //here we have ExtraProperty set

var mappedQuery = _mapper.ProjectTo<IdentityUserDto>(queryCustom); 
var resultMapped = mapperQuery.ToList(); // ExtraProperty always is 0 list

return mappedQuery;

}

### Expected behavior

ProjectTo correctly handling ExtraProperties

### Actual behavior

ProjectTo not handling ExtraProperties

### Regression?

_No response_

### Known Workarounds

_No response_

### Version

8.1.1

### User Interface

Angular

### Database Provider

EF Core (Default)

### Tiered or separate authentication server

None (Default)

### Operation System

Windows (Default)

### Other information

_No response_

[maliming]

hi

Can you upload a simple project to GitHub? Thanks.