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Lỗi biên dịch:

Main.cs(2,0): error CS1024: Wrong preprocessor directive
Main.cs(3,0): error CS1024: Wrong preprocessor directive
Main.cs(4,0): error CS1024: Wrong preprocessor directive
Main.cs(5,0): error CS1024: Wrong preprocessor directive
Main.cs(5,6): error CS1525: Unexpected symbol `namespace', expecting `identifier' or `static'
Main.cs(5,19): error CS1525: Unexpected symbol `;', expecting `identifier' or `static'
Main.cs(8,4): error CS1525: Unexpected symbol `int', expecting `identifier' or `static'
Main.cs(13,15): error CS1514: Unexpected symbol `[', expecting `.' or `{'
Main.cs(13,22): error CS1525: Unexpected symbol `;'