将 2 个查询的结果添加到单个列表中，然后对其进行排序

Question

In my model I have 2 classes: ParticipantCompany and ParticipantPerson who both inherit from Participant and have string property .Name . They also both realise IParticipant that requires them to have .Name

public interface IParticipant 
{
    public string Name { get; set; }
}

public class ParticipantCompany : Participant, IParticipant
{
    public ParticipantCompany():this(false, "","","","") { }
    public ParticipantCompany (bool isclient) : this(isclient, "","","","") { }
    public ParticipantCompany(bool isclient, string name, string address, string inncompany, string ogrn) : base(isclient, SubjectType.Company)
    {
        Name = name;
        Address = address;
        InnCompany = inncompany;
        Ogrn = ogrn;
    }
    public string InnCompany { get; set; }
    public string Ogrn { get; set; }
}
public class ParticipantPerson : Participant, IParticipant
{
    public ParticipantPerson() : this(false,"","","","") { }
    public ParticipantPerson(bool isclient) : this(isclient, "", "", "", "") { }
    public ParticipantPerson(bool isclient, string name, string address, string innperson, string ogrnip) : base(isclient, SubjectType.Person) 
    {
        Name = name;
        Address = address;
        InnPerson = innperson;
        Ogrnip = ogrnip;
    }
public string InnPerson { get; set; }
    public string Ogrnip { get; set; }
}
public abstract class Participant
{
    public Participant(bool isclient, SubjectType Type,  string name, string address) 
    { 
        SubjType = Type;
        IsClient = isclient;
        Name = name;
        Address = address;
    }

    public Participant(bool isclient, SubjectType Type ) : this(isclient, Type, "","")
    {

    }
    public int Id { get; set; }
    public  SubjectType SubjType { get; private set; }
    public bool IsClient { get; set; }
    public string Name { get; set; }
    public string Address { get; set; }

    public List<LegalCase> Cases { get; set; } = new List<LegalCase>();

}

Here's the model itself:

class CaseContext : DbContext
{
    public DbSet<ParticipantCompany> Companies{ get; set; }
    public DbSet<ParticipantPerson> Persons { get; set; }
    public DbSet<LegalCase> Cases { get; set; }
    protected override void OnConfiguring(DbContextOptionsBuilder options)
        => options.UseSqlite("Data Source=Clients.db");

}

What I want to do is query for all Company s and all Person s, merge the results into a single list and then sort the list by .Name .

        using(var db = new CaseContext())
        {
            var companies = db.Companies.ToList();
            var persons = db.Persons.ToList();
            //Cant convert from System.Collections.
            //Generic.List<Magna.CaseModel.ParticipantPerson> to 
            //System.Colleciton.Generic.IEnumerable<Magna.CaseModel.ParticipantCompany>
            List<IParticipant> participants = companies.AddRange(persons);

        }   

Answer 1

We can merge all companies and persons into a single list as follows:

//store actual data in below two variables
List<ParticipantPerson> participantPersons = new List<ParticipantPerson>();
List<ParticipantCompany> participantCompanies = new List<ParticipantCompany>();

//Merge them using Linq and anonymous types
var mergedList = participantPersons.Select(pp => new { Id = pp.Id, SubjType = pp.SubjType, IsClient = pp.IsClient, Name = pp.Name, Address = pp.Address,  InnPerson = pp.InnPerson, Ogrnip = pp.Ogrnip, InnCompany = (string)null, Ogrn = (string)null }).ToList();
mergedList.AddRange(participantCompanies.Select(pc => new {Id = pc.Id, SubjType = pc.SubjType, IsClient = pc.IsClient, Name = pc.Name, Address = pc.Address, InnPerson = (string) null, Ogrnip = (string) null, InnCompany = pc.InnCompany, Ogrn = pc.Ogrn}));
        

Or we can also create a new class with all the above properties of anonymous type and use the object of that class instead of anonymous type in Select query.