Combing Two Arrays and Removing Duplicates using Linq or Union Method

Sometimes we need to combine two arrays and eliminate any duplicates among them. We can either use union method from string class which uses default comparator or linq query.

class Program
{
    static void Main(string[] args)
    {
        string [] strings= new string[]{"James","Kavin","Robin","Anna"};

        string [] strings2= new string[]{"James","Peter","Patrick","Michael"};


        //Produces the union of two sequences by using the default equality comparer.
        IEnumerable<string> combined = strings2.Union(strings);

        foreach (var str in combined)
        {
            Console.WriteLine(str);
        }

        Console.WriteLine("\n######################## Linq way ####################");

        //remove duplicates using Linq

        var result = strings.Concat(strings2).GroupBy(s => s).Select(x => x.First());

        foreach (var str in result)
        {
            Console.WriteLine(str);
        }
        Console.ReadKey();
    }
}