Compilation failed: 5 error(s), 1 warnings

/w/foo.cs(2,0): error CS1024: Wrong preprocessor directive
/w/foo.cs(2,6): error CS1525: Unexpected symbol `namespace', expecting `identifier' or `static'
/w/foo.cs(2,19): error CS1525: Unexpected symbol `;', expecting `identifier' or `static'
/w/foo.cs(5,6): error CS1514: Unexpected symbol `[', expecting `.' or `{'
/w/foo.cs(5,7): warning CS0658: `value' is invalid attribute target. All attributes in this attribute section will be ignored
/w/foo.cs(14,13): error CS1525: Unexpected symbol `;'

自豪的采用 HydroJudge 进行评测(github.com/hydro-dev/HydroJudge)