Explanation
#elif lets you create a compound conditional directive. The #elif expression will be evaluated if neither the preceding #if (C# Reference) nor any preceding, optional, #elif directive expressions evaluate to true. If a #elif expression evaluates to true, the compiler evaluates all the code between the #elif and the next conditional directive. For example:
#define VC7
//...
#if debug
Console.Writeline("Debug build");
#elif VC7
Console.Writeline("Visual Studio 7");
#endif
Incorrect:
Not B:
* System.Reflection.Assembly.GetExecutingAssembly Method
Gets the assembly that contains the code that is currently executing.* Assembly.IsDefined Method Indicates whether or not a specified attribute has been applied to the assembly.
* System.Dignostics.Debugger Class
Enables communication with a debugger.
Property: IsAttached
Gets a value that indicates whether a debugger is attached to the process.