Console : System

main method can return int or void

struct is of value type whereas class is a reference type

bool : boolean in java

string : using System ( works like a value type)

Array.Sort, Array.Reverse, Length

boxing : converting value type to a reference type

unboxing : reverse process of boxing

internal modifier : variable can be accessed from the current program

protected internal : from the current program and the sub types

readonly modifier : like final in java

const : similar to readonly  field

is : check whether an object is compatible with a specific type

sizeof : size in bytes

typeof :

foreach : iterate through each item in a container class that supports IEnumerable class

using Block statement

out keyword : you can pass a variable declared but uninitialized to a method with this prefix

using Directive : package system

namespace alias : ex : using test=Check.Test

creation of dll   : csc /t:library

linking to dll : csc /r:x.dll

xml documentation: starts with ///  <summary>  <returns> <param>

generating doc : csc /doc:x.xml

properties : public static int value {  get { } set { } }  

virtual, new, override, access modifiers base keyword

static constructors

const: you should assign values when this variable is declared

readonly: you can assign values inside a constructor only

this: similar to java (for calling other constructor from a constructor)

base constructors

Finalize : similar to java

destructor : ~className

Dispose,Close method used in conjunction with Finalize

IDisposable

operator overloading supported

interfaces : similar to java ( additional : defining property methods)

try catch finally block similar to java (additional default catch block
which takes care of exception thrown by other managed code (languages)

delegates are like function pointers

c# preprocessor directives : define, undef, if , elif, else, endif,warning,error,
region,endregion, line,

Attributes : similar to preprocessor directives
     Conditional, DllImport, Obsolete

unsafe block : for pointers

pointer syntax similar to c++

ReferenceEquals on the object checks for equality of checks

Regular expression support in C#, System.Text.RegularExpressions

System.Collections : similar to java collections

custom Attributes

reflection : Type, typeOf, GetMethods returns MethodInfo

lock block : similar to synchronized block