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

Another option is to do something like:

public static void AddUnique( this IList self, IEnumerable items )
{
    foreach(var item in items)
        if(!self.Contains(item))
            self.Add(item);
}


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