Linq GroupBy去重

List<Product> products = new List<Product>()

{

    new Product(){ Id="1", Name="n1"},

    new Product(){ Id="1", Name="n2"},

    new Product(){ Id="2", Name="n1"},

    new Product(){ Id="2", Name="n2"},

};

 

var result = products.GroupBy(p => p.Id).Select(

    p=>new

    {

        Id=p.Key,

        Name=p.FirstOrDefault().Name

    });

result.ToList().ForEach(v =>

    {

        Console.WriteLine(v.Id + ":" + v.Name);

    });