Archive - May 15, 2022

The Insert method of List class inserts an object at a given position. The first parameter of the method is the 0th based index in the List.The InsertRange method can insert a collection at the given position. Add an item to a ListThis shows how to add an item to a List using the List.Add() method. The .Add method adds an item to the end of the List by default.List drinks = new List ();drinks.Add(new Drink{ Name = "Beer", Id=8 });drinks.Add(new Drink{ Name = "Champagne", Id=312 });drinks.Add(new Drink{ Name = "Lemonade", Id=14 });There’s another method you can use if you want to add items to a C# List – AddRange(). It allows you to add one List to another List.//The List to start with8: Beer312: Champagne14: LemonadeList extraDrinks = new List { new Drink{ Name = "Sambucca", Id=9 }, new Drink{ Name = "Prosecco", Id=192 }, new Drink{ Name = "Vodka and orange", Id=17 } };barOrder.AddRange(extraDrinks);//The List now8: Beer312: Champagne14: Lemonade9: Sambucca192: Prosecco17: Vodka and orangeAdd an item to the start of a C# List – InsertIf you want to add an item to the start of the List you would use the List.Insert() method which inserts an item to the given List at the position provided. So to insert an item to the start of the List you would specify the position as 0, which is the first position in the list.//The List to start with312: Champagne74: Coke88: Sparkling Water//now insert an item into the first positiondrinks.Insert(0, new Drink{ Name = "Orange Juice", Id=501 };//The List now501: Orange Juice312: Champagne74: Coke88: Sparkling WaterBut to insert an item to the 3rd row of the List you would specify the position as 2.//The List to start with501: Orange Juice312: Champagne74: Coke88: Sparkling Waterdrinks.Insert(2, new Drink{ Name = "Apple Juice", Id=502 });//The List now501: Orange Juice312: Champagne502: Apple Juice74: Coke88: Sparkling WaterAnd similarly to the AddRange() method I talked about above, there is an InsertRange() method which allows you to insert a List into another List.//The List to start with501: Orange Juice312: Champagne502: Apple Juice74: Coke88: Sparkling WaterList moreDrinks = new List { new Drink{ Name = "Martini", Id=43 }, new Drink{ Name = "Mojito", Id=44 }, new Drink{ Name = "Pale Ale", Id=18 } };//Insert this List to the 3rd rowdrinks.InsertRange(2, moreDrinks);//The List now501: Orange Juice312: Champagne43: Martini44: Mojito18 Pale Ale502: Apple Juice74: Coke88: Sparkling Water