.Net FAQ's
.Net Faq's
There are 3 types of comments in C#.
Single line (//)
Multi (/* */)
Page/XML Comments (///).
Namespace is a logical grouping of class.
using System;
using System.Collections.Generic;
using System.Windows.Forms;
There are several characteristics of C# are : 
Simple
Type safe
Flexible
Object oriented
Compatible
Consistent
Interoperable
Modern
C# does not support #include statement. It uses only using statement.
In C# , class definition does not use a semicolon at the end.
C# does not support multiple code inheritance.
Casting in C# is much safer than in c++.
In C# switch can also be used on string values.
Command line parameters array behave differently in C# as compared to C++.
It is necessary to understand some of the concepts used extensively in object oriented programming.These include
Objects
Classes
Data abstraction and encapsulation
Inheritance
Polymorphism
Dynamic Binding
Message passing.
Yes. Multiple interfaces may be inherited in C#.
Inheritance is deriving the new class from the already existing one.
Scope refers to the region of code in which a variable may be accessed.
public :The keyword public is an access modifier that tells the C# compiler that the Main method is accessible by anyone.
static :The keyword static declares that the Main method is a global one and can be called without creating an instance of the class. The compiler stores the address of the method as the entry point and uses this information to begin execution before any objects are created.
void : The keyword void is a type modifier that states that the Main method does not return any value.

Abstract
Sealed
Virtual
Const
Event
Extern
Override
Readonly
Static
New