Is there an AddUnique method similar to Addrange() for alist in C#

Question

I have a list in C#:

       var list = new List();
       list.AddRange(GetGreenCars());
       list.AddRange(GetBigCars());
       list.AddRange(         


        

Answer 1

Yet another option using Linq:

public static void AddUnique(this IList self, IEnumerable items)
{
  self.AddRange(
    items.Where(x => self.FirstOrDefault(y => y.Name == x.Name) ==
    null).ToList());
}

var list = new List();
list.AddUnique(GetGreenCars());
list.AddUnique(GetBigCars());
list.AddUnique(GetSmallCars());