Fatal Error C1070

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mismatched #if/#endif pair in file 'filename'

An #if, #ifdef, or #ifndef directive has no corresponding #endif.

The following sample generates C1070:

// C1070.cpp
#define TEST

#ifdef TEST

#ifdef TEST
#endif
// C1070

Possible resolution:

// C1070b.cpp
// compile with: /c
#define TEST

#ifdef TEST
#endif

#ifdef TEST
#endif