Scope and lifetime

What you learn in this lesson

• explain in which block a variable is valid and how long it lives
• read and fix errors like CS0103, CS0128 and CS0136
• know fields as values that live longer than a method call, and see their danger
• name fixed values with const and readonly
• recognize shadowing of names, including a namespace that shadows a class
• keep the Kladde free of shared state, except for the list that is passed along