| Lambda Expressions | On slide | In textbook | 
| Last, member of LinkedList | On slide | In textbook | 
| LastAccessTime, member of class DirectoryInfo | On slide | In textbook | 
| LastAccessTime, member of class FileInfo | On slide | In textbook | 
| LastIndexOf, member in List | On slide | In textbook | 
| Leaf, part of Composite design pattern | On slide | In textbook | 
| Length, member of class FileInfo | On slide | In textbook | 
| Length, Stream operation | On slide | In textbook | 
| lifted operators, nullable types | On slide | In textbook | 
| LinkedList | On slide | In textbook | 
| LinkedList, in hierarchy of list classes | On slide | In textbook | 
| LinkedList, sample use of | On slide | In textbook | 
| LinkedList, time complexities of operations in | On slide | In textbook | 
| LinkedListNode | On slide | In textbook | 
| LINQ Concepts | On slide | - | 
| LINQ Query Operations vs List<T> methods. | On slide | - | 
| List og Linq? | On slide | - | 
| List, property of LinkedListNode | On slide | In textbook | 
| List | On slide | In textbook | 
| List, in hierarchy of list classes | On slide | In textbook | 
| List, time complexities of operations in | On slide | In textbook | 
| ListDictionary, non-generic collection type, in hierarchy | On slide | In textbook | 
| local variable, initialization of | On slide | In textbook | 
| Local variables in methods | On slide | In textbook | 
| logical expression | On slide | In textbook | 
| Logical expressions | On slide | In textbook | 
| Loop Invariants | On slide | - | 
| LotteryAccount | On slide | In textbook |