What does compiler do internally when compile C# program?

Question

Hi , I have read lot of answer on internet but not getting any satisfactory answer of this question. Can anyone give me the exact idea about it . Thanks in advance.

Udit Sharma · Answer

@Rajkiran Swain In case of C# , program compiles to IL code (Managed code) and at runtime it converted into native machine code by JIT compile in CLR.

Rajeesh Menoth · Answer

Hi, You can refer john skeet article. http://csharpindepth.com/Articles/Chapter6/IteratorBlockImplementation.aspx

Rajkiran Swain · Answer

Nice question! Let me put it step by step. Step1 :First of all, the compiler checks for syntax errors. If there's any syntax error, compiler warns the user. Step2:If there's no syntax errors, all the comments, tabs and extra spaces from the program are removed. Step3: The compiler recursively divides the whole program blockwise (e.g. if-else block, for loop, functions etc). Recursively because there maybe nested blocks. Step4: All the blocks are further divided by semicolons. Step5:Now the compiler has set of blockwise statements. The compiler converts all the statements written in C into Assembly Language. Step6:While converting the statements from C to Assembly Language, the compiler will find the predefined functions from the header files you have imported using #include. Step7: At last all the instructions in Assembly Language are merged into an .OBJ file. Step8:When you run the program (by Ctrl+F9), the .OBJ file is further converted into .EXE file (Machine language) depending on the processor of your computer. Please accept my ans if it will helpful .

What does compiler do internally when compile C# program?

Answers (3)