Code:for(int i =0;i< bfCount-1; i++) { for(int t =i+1; t <= bfCount-1; t++) { int tempX; int tempY; if((int)bX[i] > (int)bX[t]) tempX = ((int)bX[i]-(int)bX[t]); else tempX = ((int)bX[t]-(int)bX[i]); if((int)bY[i] > (int)bY[t]) tempY = ((int)bY[i]-(int)bY[t]); else tempY = ((int)bY[t]-(int)bY[i]); db.Add(tempX + tempY); } }