using System;

using System.Collections.Generic;

using System.Linq;

​

public class Task

{

    public string Name {get;set;}

    public string ResourceName {get;set;}

}

​

public class Program

{

    public static void Main()

    {

        List<Task> Tasks = new List<Task>();

        Tasks.Add(new Task(){Name = "a",ResourceName = "ra"});

        Tasks.Add(new Task(){Name = "b",ResourceName = "rb"});

        Tasks.Add(new Task(){Name = "c",ResourceName = "rc"});

        Tasks.Add(new Task(){Name = "a",ResourceName = "ra"});

        Tasks.Add(new Task(){Name = "b",ResourceName = "rb"});

        Tasks.Add(new Task(){Name = "c",ResourceName = "rc"});

        Console.WriteLine("Initial List :");

        foreach(var t in Tasks){

            Console.WriteLine(t.Name);  

        }

        List<Task> Tasks2 = Tasks.GroupBy(x => new {x.Name, x.ResourceName}).Select(g => g.First()).ToList();

        Console.WriteLine("Final List :");

        foreach(Task t in Tasks2){

            Console.WriteLine(t.Name);  

        }

    }

}