When in doubts, try inbuilt help csc.exe /help
:
==> pushd "C:\Windows\Microsoft.NET\Framework64\v4.0.30319"
==> csc.exe /? | findstr /I "noconfig fullpaths C# @ (R) help"
Microsoft (R) Visual C# Compiler version 4.7.2556.0 for C# 5
This compiler is provided as part of the Microsoft (R) .NET Framework, but only
supports language versions up to C# 5, which is no longer the latest version.
For compilers that support newer versions of the C# programming language, see
http://go.microsoft.com/fwlink/?LinkID=533240
Visual C# Compiler Options
@<file> Read response file for more options
/help Display this usage message (Short form: /?)
/noconfig Do not auto include CSC.RSP file
/fullpaths Compiler generates fully qualified paths
==>
Then, find csc.exe response file documentation:
@ (C# Compiler Options)
The @
option lets you specify a file that contains compiler options
and source code files to compile.
Syntax: @response_file
Arguments: response_file
A file that lists compiler options or source code files to compile.
Remarks: The compiler options and source code files will be processed by the compiler just as if they had been specified on the
command line.
...