c# - Weird division by zero error -

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well, im trying calculate slope of line, , naturally, when point becomes undefined when try divide zero. handle in try catch , still getting division 0 error, in rather... unexpected spot...

here code:

private void tmrenemymovement_tick(object sender, eventargs e) {         (int = 0; < enemies.count; i++) {             int enex = enemies[i].getenemyworldposx();             int eney = enemies[i].getenemyworldposy();             int playerx = player.getplayerworldposx();             int playery = player.getplayerworldposy();              double slope = -100000000;             try {                 slope = (getdistancebetween(eney, playery)) / (getdistancebetween(enex, playerx));             } catch (dividebyzeroexception) {//division 0 exception handled here.                 slope = getdistancebetween(eney, playery) / 1;             }              int multiplicative = 1;              int rise = 1;//convert.toint32(slope * multiplicative);             int run = multiplicative;             text = convert.tosingle(slope) + "";              if (enemies[i].getenemyworldposx() < player.getplayerworldposx() && enemies[i].getenemyworldposy() > player.getplayerworldposy()) {//enemy resides in quadrant 2                 enemies[i].moveenemyto(run, rise, "+-");             } else if (enemies[i].getenemyworldposx() < player.getplayerworldposx() && enemies[i].getenemyworldposy() < player.getplayerworldposy()) {//enemy resides in quadrant 3                 enemies[i].moveenemyto(run, rise, "+-");             } else if (enemies[i].getenemyworldposx() > player.getplayerworldposx() && enemies[i].getenemyworldposy() > player.getplayerworldposy()) {//enemy resides in quadrant 1                 enemies[i].moveenemyto(run, rise, "-+");             } else if (enemies[i].getenemyworldposx() > player.getplayerworldposx() && enemies[i].getenemyworldposy() < player.getplayerworldposy()) {//enemy resides in quadrant 4                 enemies[i].moveenemyto(run, rise, "--");             }         }         bitmap bmp = map.getmap() bitmap;          using (graphics drawenemy = graphics.fromimage(bmp)) {             (int = 0; < enemies.count; i++) {                 drawenemy.drawimage(enemies[i].getsprite(), new pointf(enemies[i].getenemyworldposx(), enemies[i].getenemyworldposy()));             }         }     }

and strange reason, in weird spot doesnt me: picture

this method defined follows:

private int worldpositiony = 0;  public int getenemyworldposy() {     return worldpositiony; }

as can see, simple getter, why getting division 0 error #1 @ all, when handled in try catch, , #2 on line? have missed something?

**edit: ** here stack trace: enter image description here

try recompile program , ensure in debug mode. not use try/catch calculating slope - satement long. use

var distancex = getdistancebetween(enex, playerx); if (distancex != 0)     slope = getdistancebetween(eney, playery) / distancex; else     slope = getdistancebetween(eney, playery);

and exception caught not critical. can press continue , go on. or can switch off handled exceptions (uncheck user-handled in debug->exceptions->common language runtime). or can run program without attached debugger (use ctrl+f5).


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