static void MoveWithSnapToGrid(UIControllerBox controllerBox, int dx, int dy) { //sample move with snap to grid Point pos = controllerBox.Position; int newX = pos.X + dx; int newY = pos.Y + dy; //snap to gridsize =5; //find nearest snap x int gridSize = controllerBox.GridSize; float halfGrid = (float)gridSize / 2f; int nearestX = (int)((newX + halfGrid) / gridSize) * gridSize; int nearestY = (int)((newY + halfGrid) / gridSize) * gridSize; controllerBox.MoveTo(nearestX, nearestY); }