14.1. HIDDEN FILES14.2. CODE FILE STRUCTURE14.2.1. Code Regions14.2.2. Conditional Compilation14.2.2.1. Setting Constants in Code14.2.2.2. Setting Constants with the Project's Compilation Settings14.2.2.3. Predefined Constants14.2.2.4. DEBUG14.2.2.4.1. Assert14.2.2.4.2. Fail14.2.2.4.3. IndentSize, Indent, Unindent, and IndentLevel14.2.2.4.4. Write, WriteLine, WriteIf, and WriteLineIf14.2.2.5. TRACE14.2.2.6. CONFIG14.2.2.7. Debugging Level Constants14.2.3. Namespaces14.3. TYPOGRAPHIC CODE ELEMENTS14.3.1. Comments14.3.2. XML Comments14.3.3. Line Continuation14.3.4. Implicit Line Continuation14.3.5. Line Joining14.3.6. Line Labels14.4. SUMMARY