Objective-C v.s. C# -- A Quick Compare

Here is a quick comparison table of some basic terminologies after I read "Learning Objective-C: A Primer":

Objective-C	C#
Instance variable	Member variable
“id” weakly type	“var” implicit type
Strong typed variable must declare itself to be pointer: MyClass *myObject1;	Reference type variables are by default pointers.
instance methods and class methods	object methods and static methods
Messaging an object	Invoking an instance’s method
Properties	Properties (get; set;)
“self”	“this”
protocol	interface