Common Type System CTS :A fundamental part of the .NET 
Framework's Common Language Runtime (CLR), the CTS 
specifies no particular syntax or keywords, but instead 
defines a common set of types that can be used with many 
different language syntaxes.

Common Language Specification  (CLS):The Common Language 
Specification  (CLS) describes a set of features that 
different languages have in common.
The CLS includes a subset of the Common Type System (CTS).

The CLR is a multi-language execution environment

CLR
this is common language runtime.the code which is in 
environment of clr is called managed code.every language 
has runtime in case of .net there is CLR.so that that has 
some responsibilites that is to tack care of the execution 
of code
other responsibilites 
garbage collection-in that it remove the object which are 
not refered for long time.using Idisposable interface with 
dispose method

Jit compiler also convert IT to native code
In that include exception handling.etc

Cls
common language spefication
thsi is guideline that to communicate smoothly with other

CTS
common type system
this is used to communicate with other language.
example  in vb we have int and in c++ we have long so that 
in one case they are not compatiable with each other so 
that CTS palys important role with using System.int32

What is the CTS?
	A set of common types
	any language that runs in CLR should implement
	no syntax specified
	Languages often define aliases
	For example
	CTS defines System.Int32 – 4 byte integer
	C# defines int as an alias of System.Int32
	string -> System.String
	object -> System.Object
	
	What is the CLS?
	A specification of language features
	how methods may be called
	when constructors are called
	subset of the types in CTS are allowed
	E.g. UInt32 is in CTS, but not in CLS
	Non-CLS-compliant example
	Code that takes UInt32 in a public method
	Can mark classes as CLS-compliant
	not marked is assumed to mean not compliant.

Common Language Specification  (CLS):The Common Language 
Specification  (CLS) describes a set of features that 
different languages have in common.
The CLS includes a subset of the Common Type System (CTS).

The CLR is a multi-language execution environment