什么是C＃编译器，怎么使用csc xxx.cs 进行调试?

用vs.net自带的命令行方式。要么自己写这个批处理来设定路径吧
123.bat
%comspec% /k "C:\123.bat"@SET VSINSTALLDIR=D:\Program Files\Microsoft Visual Studio .NET
2003\Common7\IDE
@SET VCINSTALLDIR=D:\Program Files\Microsoft Visual Studio .NET 2003
@SET FrameworkDir=C:\WINNT\Microsoft.NET\Framework
@SET FrameworkVersion=v1.1.4322
@SET FrameworkSDKDir=D:\Program Files\Microsoft Visual Studio .NET
2003\SDK\v1.1
@rem Root of Visual Studio common files.@if "%VSINSTALLDIR%"=="" goto Usage
@if "%VCINSTALLDIR%"=="" set VCINSTALLDIR=%VSINSTALLDIR%@rem
@rem Root of Visual Studio ide installed files.
@rem
@set DevEnvDir=%VSINSTALLDIR%@rem
@rem Root of Visual C++ installed files.
@rem
@set MSVCDir=%VCINSTALLDIR%\VC7@rem
@echo Setting environment for using Microsoft Visual Studio .NET 2003 tools.
@echo (If you have another version of Visual Studio or Visual C++ installed
and wish
@echo to use its tools from the command line, run vcvars32.bat for that
version.)
@rem@REM %VCINSTALLDIR%\Common7\Tools dir is added only for real setup.@set
PATH=%DevEnvDir%;%MSVCDir%\BIN;%VCINSTALLDIR%\Common7\Tools;%VCINSTALLDIR%\C
ommon7\Tools\bin\prerelease;%VCINSTALLDIR%\Common7\Tools\bin;%FrameworkSDKDi
r%\bin;%FrameworkDir%\%FrameworkVersion%;%PATH%;
@set
INCLUDE=%MSVCDir%\ATLMFC\INCLUDE;%MSVCDir%\INCLUDE;%MSVCDir%\PlatformSDK\inc
lude\prerelease;%MSVCDir%\PlatformSDK\include;%FrameworkSDKDir%\include;%INC
LUDE%
@set
LIB=%MSVCDir%\ATLMFC\LIB;%MSVCDir%\LIB;%MSVCDir%\PlatformSDK\lib\prerelease;
%MSVCDir%\PlatformSDK\lib;%FrameworkSDKDir%\lib;%LIB%@goto end:Usage@echo. VSINSTALLDIR variable is not set.
@echo.
@echo SYNTAX: %0@goto end:end