using System;

using System.Linq;

using MoreLinq;

public class Program

{

    public static void Main()

    {

        var inputs =  new []

        {

            new {Name = "Bruce wayne", State = "New York"},

            new {Name = "Rajnikant", State = "Tamil Nadu"},

            new {Name = "Robert Downey jr", State = "Pennsylvania"},

            new {Name = "Dwane Johnson", State = "Pennsylvania"},

            new {Name = "Hritik", State = "Maharashtra"}

        };

        var output = inputs.DistinctBy(x => x.State);

        foreach(var o in output)

            Console.WriteLine(o.Name);

    }

}

​