Compilation failed: 6 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(3,6): error CS1514: Unexpected symbol `struct', expecting `.' or `{'
/w/foo.cs(6,1): error CS1525: Unexpected symbol `a'