C# Linq

            List<Test> list = new List<Test>();
            list.Add(new Test { score = 10,name = "张君宝" });
            list.Add(new Test { score = 20,name = "刘惜君" });
            list.Add(new Test { score = 20,name = "刘惜君" });
            list.Add(new Test { score = 30,name = "八戒" });

            int @R_311_10586@l = (from temp in list
                             where temp.name == "刘惜君"
                             SELEct temp.agE).Count();

            int score = (from temp in list
                         where temp.name == "刘惜君"
                        SELEct temp.score).sum();
            this.textBox1.Text = "刘惜君：" + @R_311_10586@l + "人" + score + "score";

            messageBox.Show(this.textBox1.Text);   //return 刘惜君：2人40score