main features of a static class

public

private

protected

internal

protected internal

method hiding

polymorphism

method parameters

methods
passing a parameter by value vs. reference

out parameters used if multiple values need to be returned from a method

parameter arrays

private fields naming convention

"value" keyword

properties

using properties for encapsulation

public string city {get; set;}

object initializer syntax

struct vs. class

Interfaces

Explicit Interface Implementation

Abstract Classes

Abstract Classes Vs. Interfaces

problem with multiple class inheritance
(Ofcourse c sharp does not support this)

Multiple class inheritance using interfaces

Multicast Delegates

Handling Exceptions