1.Formerly known as MSIL, CIL is a programming language that NET developers use. It represents the lowest possible level for a language that humans can still read.
2.CIL is an object-oriented programming language that is a partially compiled code that .NET developers will then compile to native machine code.
3.CIL is used to convert a value type to an object type.
4.CIL is a compiled code library that Microsoft developed as an open specification. Developers use it for security, versioning, and deployment purposes.