What is CLR, MSIL, CLS, CTS ??????????

CLR it is Common Language Runtime
It provides Services like
*Automatic Memory Management
*Thread Management
*Code Compilation & Execution
*Code Verification
*High level of security
*Structured Exception Handling
*Interoperability between Managed and Unmanaged code.

MSIL-MicroSoft INtermediate Language also called IL or CIL
It is a Language Independent
After Compiling the Source Code The CLR gives MSIL code
By using JIT compiler it converts into Native Code

CTS-Common Type System.It Provides the common data types to the compiler.

CLS-Common Language Specification.It has a set of rules to provide the Language Interaperability.And it is a subset of CTS