How to convert IdentityUser to BaseEntity

Question

I have user Model, like this:

    public class User : IdentityUser<Guid>
    {
        public string FullName { get; set; }
       //... more lines
    }

Now I need to use some methods for user, that are made for base entity, so I want to add Base Entity, but it does not work.

    public class User : IdentityUser<Guid>, BaseEntity
    {
        public string FullName { get; set; }
       //... more lines
    }

I tried creating new user with only BaseEntity and then it works, but then I lose all the methods for IdentityUser which I don't want.

Possible duplicate of [Multiple Inheritance in C#](https://stackoverflow.com/questions/178333/multiple-inheritance-in-c-sharp) — Federico Dipuma, Jun 01 '19 at 21:41
IdentityUser and BaseEntity are classes. I will look into multiple inheritance, thanks but I read somewhere that this can be done using mapping — kr_v, Jun 01 '19 at 21:57

Parrish Husband · Accepted Answer · 2019-06-01T22:17:28.683

Since multiple inheritance is not possible in C#, you could have an IdentityUser as a field and wrap the properties and methods you want (assuming IdentityUser is not your own class):

public class User : BaseEntity
{
    private readonly IdentityUser<Guid> _identityUser;
    public string FullName { get; set; }

    public string UserName
    {
        get { return _identityUser.UserName; }
        set { _identityUser.UserName = value; }
    }

    public string Id
    {
        get { return _identityUser.Id; }
        set { _identityUser.Id = value ; } 
    }

    // ... etc.

    public User(IdentityUser<Guid> identityUser)
    {
        _identityUser = identityUser;
    }
}

How to convert IdentityUser to BaseEntity

1 Answers1