../ Iterator Pattern – Design Patterns (ep 16)-uNTNEfwYXhI.mp4 The Only Time You Should Use Polymorphism-YaSMkzmc_sA.mp4 Only Use Inheritance If You Want Both of These-C3B5IIlt4-0.mp4 Liskov Substitution Principle-7hXi0N1oWFU.mp4 When Microsoft Violated Liskov Substitution Principle in .NET-3dya1VI_zp8.mp4