Composition vs. Aggregation

Aggregation.cs

public class Account {
  private Profile _profileInfo;
  private Login _loginInfo;
  
  public Account(Profile profileInfo, Login loginInfo){
    _profile = profileInfo;
    _loginInfo = loginInfo;
  }
}

Composition.cs

public class Account {
  private Profile _profileInfo;
  private Login _loginInfo;
  
  public Account(){
    _profile = new Profile();
    _loginInfo = new Login();
  }
}