Compilation failed: 7 error(s), 0 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(5,1): error CS1525: Unexpected symbol `int', expecting `identifier' or `static'
/w/foo.cs(14,2): error CS1525: Unexpected symbol `cin', expecting `identifier' or `static'
/w/foo.cs(17,3): error CS1525: Unexpected symbol `cout', expecting `identifier' or `static'
/w/foo.cs(19,3): error CS1514: Unexpected symbol `}', expecting `.' or `{'