c# - linq distinct or group by multiple properties

Question

How can I using c# and Linq to get a result from the next list:

 var pr = new List<Product>()
   {
       new Product() {Title="Boots",Color="Red",    Price=1},
       new Product() {Title="Boots",Color="Green",  Price=1},
       new Product() {Title="Boots",Color="Black",  Price=2},

       new Product() {Title="Sword",Color="Gray", Price=2},
       new Product() {Title="Sword",Color="Green",Price=2}
   };

Result:

        {Title="Boots",Color="Red",  Price=1},               
        {Title="Boots",Color="Black",  Price=2},             
        {Title="Sword",Color="Gray", Price=2}

I know that I should use GroupBy or Distinct, but understand how to get what is needed

   List<Product> result = pr.GroupBy(g => g.Title, g.Price).ToList(); //not working
   List<Product> result  = pr.Distinct(...);

Please help

question from:https://stackoverflow.com/questions/20582391/linq-distinct-or-group-by-multiple-properties

Answer 1

It's groups by needed properties and select:

List<Product> result = pr.GroupBy(g => new { g.Title, g.Price })
                         .Select(g => g.First())
                         .ToList();