Compilation failed: 7 error(s), 0 warnings

error CS2001: Source file `csc' could not be found
/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(4,0): error CS1032: Cannot define or undefine preprocessor symbols after first token in file
/w/foo.cs(5,6): error CS1514: Unexpected symbol `struct', expecting `.' or `{'
/w/foo.cs(9,1): error CS1525: Unexpected symbol `a'