Regex replace special comments -

so few months ago 1 of colleagues left. used comment code way:

//---------------------------- // comment //----------------------------  private void func()... 

so each comment, instead of using 1 line @ most, uses 4 lines (including break line), drives me crazy. i'm trying create regex can remove comment safely , replace it. above code should way:

// comment private void func()... 

i thought of removing each 1 of '//----------------------------' leaves me many empty lines break line between comment , actual line described. appreciated.

edit

note one: our project written in visual studio

note two: comments may contain more 1 line of comment, example:

//---------------------------- // line 1 comment // line 2 comment //---------------------------- 

this expression matches case , 3 lines of comments first , last ones have trailing -:

((\s|\t)*\/{2,})(.*[-]+)(\r?\n)((\1(.*)\4?)+)\4\1\3\4? 

try here

and can replace with:

\5 (or $5) 

edit: multi-line comments.