how to delete from a list c#

var resultList = new List<int>();
resultList.Add(1);
resultList.Add(2);
resultList.Add(3);

// Removes the number 1 from the index 0 in the list
resultlist.RemoveAt(0);

// Allows you to remove an Object from the list instead
var itemToRemove = resultlist.Single(r => r.Id == 2);
resultList.Remove(itemToRemove);