Exception "The source and destination types must be the same" when converting nullable property to non Nullable

[ahmedeltabee]

can't convert nullable to non nullable using expression mapping here is the code : Model { public Guid Id { get; set; } } Dto {public Guid? Id { get; set; } }

Service layer { public async Task GetFirstOrDefaultAsync(Expression<Func<TDto, bool>> dtoPredicate) { var predicate = Mapper.MapExpression<Expression<Func<T, bool>>>(dtoPredicate); var result = await Repository.FirstOrDefaultAsync(predicate); var dtoResult = Mapper.Map(result); return dtoResult ; } }

expection : Message =The source and destination types must be the same for expression mapping between literal types. Source Type: Guid, Source Description: Id, Destination Type: Nullable`1, Destination Property: Id.

[BlaiseD]

That's an expected exception thrown by this library.

Here's how it is designed to be used.