C# full form

IDE - Integrated Development Environment

FCL- Framework Class library

JIT -  Just In time 

ADO- Active data object

CTS - Common type system

CLS - Common Language Specification

CLR - Common Language Runtime

BCL - Base class library

NGWS - Next Generation Windows Service

MSIL - microsoft intermediate language

xml - extensible markup language 

SOAP - simple object access protocol

UDDI - universal description discovery and integration

WSDL - web service description language

UI - user interface

GDI -  Graphics device interface

TIFF - tagged Image File Format

XSL -  Extensible Style sheet language

DLL - dynamic link library

TCP/IP - transmission control protocol/Internet protocol

PE - portable executable

OOP - object oriented programming 

FIFO - first in first out

LIFO - last in first out

GUI - graphical user interface

RTF - rich text format

MDI - Multiple document interface

SDI - single document interface

ADO.NET - ActiveX data object

RDO - Remote data object

DAO - Data Access Object 

DSN - Data Source Name

ODBC - Object Database Connectivity

GC - garbage collector

CIL - common intermediate language

GIF - graphical interchange format

GAC - global assembly catch