C6505

 

For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.

warning C6505: invalid annotation: MustCheck property may not be used on values of void type

This warning indicated that MustCheck property was used on a void data type. You cannot use MustCheck property on void type. Either remove the MustCheck property or use another data type.

The following code generates this warning:

#include <sal.h>  
_Must_inspect_result_ void f()  
{  
    //Code ...  
}  

To correct this warning, use the following code:

#include <sal.h>  
_Must_inspect_result_ char* f()  
{  
    char *str ="Hello World";  
    //Code ...  
    return str;  
}  

C6516

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