GraphQLTypeBuilder AddListField with another typeBuilder

[ruzerix]

Hello,

I stuck with shema setting like this

var per = schema.AddType<personal>(); //EFDbContext.personals
per.AddListField("departments", EFDbContext.departments.Select(o => new { my_custom = o.xxx }));

when I use postman to call these graphql
I get an error

Argument types do not match

I know that when use GraphQLTypeBuilder to add field must be the same type
But if I want this, How I do ?

Thank you