The Microsoft corporation announced in 2000, Microsoftof the same company NET for environment object-oriented programming language in orderto develop the software.

While expanding C language/ C++ language in the base,function and inscription etc. of the Java wind are included.The function which such as garbage collection also Java has and management strengthening of variable is added. Although development efficiency improves markedly from C++,it assumes thatthe application which has the operating speed above equality to Visual Basic can be developed.

As for the software which was developed with C# it is convertedby the programwiththe intermediate language, Microsoft corporation individual MSIL,Microsoft NETit is common hardware requirement,NETFramework(CLR) interpreting this, it executes. It is seen, that there isthe aim of carrying outthe correspondence to the multi-platform by the fact that intermediate language is put also such pointhas becomethe cause whichis called "Java of Microsoft ".