end of the course

C# Full Course for free/15.List.md

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+# List
+
+data structure that represents a list of objects that can be
+accessed by index.
+Similar to array, but can dynamically increase/decrease in size
+using System.Collection.Generic
+
+```C#
+// error with array
+String[] food = new string[3];
+
+food[0] = "pizza";
+food[1] = "hamburger";
+food[2] = "hotdog";
+food[3] = "Salad";
+
+foreach(String item in food)
+{
+    Console.WriteLine(item);
+}
+
+```
+
+```C#
+using System.Collection.Generic
+
+List<String> food = new List<String>();
+
+food.Add("fries");
+food.Add("pizza");
+food.Add("hamburger");
+food.Add("hotdog");
+food.Add("Salad");
+food.Add("fries");
+
+foreach(String item in food)
+{
+    Console.WriteLine(item);
+}
+
+// accessing an element
+Console.WriteLine(food[1]);
+
+food.Remove("fries");
+
+food.Insert(0,"sushie");
+
+Console.WriteLine(food.Count());
+
+Console.WriteLine(food.IndexOf("hotdog"));
+Console.WriteLine(food.LastIndexOf("fries"));
+Console.WriteLine(food.Cotains("pizza"));
+food.Sort();
+food.Reverse();
+food.Clear();
+String[] foodArray  = food.ToArray();
+food.Clear();
+```
+
+## List of object
+
+```C#
+List<Player> player = new List<Player>();
+
+Player player1 = new Player ("Chad")
+Player player2 = new Player ("Steve")
+Player player3 = new Player ("Karen")
+
+
+players.Add(player1);
+players.Add(player2);
+players.Add(player3);
+
+// or anonymously
+
+players.Add(new Player ("Karen"));
+players.Add(new Player ("Chad"));
+players.Add(new Player ("Steve"));
+
+foreach(Player player in players)
+{
+    Console.WriteLine(player);
+}
+
+class Player
+{
+    public string username;
+    
+    public Player(String username)
+    {
+        this.username=username;
+    }
+
+    public override string ToString()
+    {
+        return username;
+    
+    }
+}
+
+```