Chapter 1-Lesson 2

• Reference types store addresses of data on Stack
• Actual data (object) is stored on heap.
• Garbage collection occurs only when needed.
• Assigning one reference variable to another doesn’t copy the data. Instead, assigning
  a reference variable to another instance merely creates a second copy of the reference
• When you modify a reference type, you modify all copies of that reference type.
• Arrays are reference types.
• Stream is an abstract class.
• Immutable objects are those whose value cannot be changed once it is assigned, e.g. string.
• If we tend to change an immutable object, it will return a new object.
• The default constructor for StringBuilder class creates 16-bytes buffer in memory.
• We can create our own Exceptions by deriving from System.ApplicationException class
• The Finally block runs after the Try block and any Catch blocks have
  finished executing, whether or not an exception was thrown.
• IConvertable enables a class to be converted to a base (built-in type)
• Partial classes allow you to split a class definition across multiple source files
• Using generics doesn’t require casting or boxing, which
  improves run-time performance
• A delegate declaration is sufficient to define a delegate class
• EventHandler is a predefined delegate that specifically represents an event handler
  method for an event that does not generate data