I tried to compile c# program from command line and I recieved this message "The name specifined is not recognized as an internal or external command, operable program or batch file."

I assume you are attempting to run the csc.exe executable from the command prompt - if so, that error means the path you are giving the command prompt is the wrong one. So if for example 'csc.exe' is stored on your C drive you would specify 'c:\csc.exe'.
What usually causes this is you have a space or something in one of the directories in your path and you are not enclosing the path in quotation marks
So instead of
C:\My Directory\csc.exe

you should be using
"C:\My Directory\csc.exe"

oooor if you are just typing in "csc" as stated in the msdn article here then your computer is saying that it doesn't know where csc is and you have to either set it up to know where it is, or just specify the path of csc yourself.
></\/~Psightoplasm`~

The right answer

The right answer

The right answer