A high-level, general-purpose programming language, created as an extension of the C programming language, that has object-oriented, generic, and functional features in addition to facilities for low-level memory manipulation.
If you mean on the next line like this:
/*
*
Then that is because most block-styled languages follow the pattern of putting an asterisk on each new line so multiline comments indent to the same level. It is a consistency thing.
If you want to disable this convention for some reason then you can do so by going to Tools \ Options and then Text Editor \ C/C++ \ Code Style \ General and uncheck the Insert existing comment style option.