Question

I have a model and a partial model which contains only the properties that I need to expose in JSON.

But the properties between the model and his partial model are redundant.

How can I avoid that or improve my approach?

namespace Dashboard.Models.UserModels
{
    public class UserModel
    {
        public int id { get; set; }
        public string dbName { get; set; }
        public string firstname { get; set; }
        public string lastname { get; set; }
        public int idExternal { get; set; }
        public int idInstance { get; set; }
        public string login { get; set; }
        public string password { get; set; }
        public DateTime? dtContractStart { get; set; }
        public DateTime? dtContractEnd { get; set; }
        public string emailPro { get; set; }
        public string emailPerso { get; set; }

        public LuccaUserModel()
        {
            idInstance = -1;
        }

        // partial model for json result
        // not sure is the best way or have to be here
        public class PartialUserModel
        {
            public int id { get; set; }
            public string firstname { get; set; }
            public string lastname { get; set; }
            public string emailPro { get; set; }
            public string emailPerso { get; set; }
            public DateTime? dtContractStart { get; set; }
            public DateTime? dtContractEnd { get; set; }
            public string url { get; set; }
        }

        // UserModel Methods
    }
}

Answer 1

You can rename PartialUserModel UserModelBase class (or leave it as is… it just makes better logical sense to do so) and make UserModel to inherit from it:

public class UserModel : UserModelBase
{
    ...
}

Of course you’ll need to remove all duplicate properties from UserModel in this case.