Preventing randomly generated pictureboxes from clashing (C# Form)

The pictureboxes I create in this way sometimes overlap. how can i prevent it ?. I want a distance between each picture box. for example, a distance of at least 10px between pictureboxes.

 int sayac = 0;
            Random random = new Random();
            while (sayac < 10)
            {

                PictureBox picture = new PictureBox();
                picture.BackColor = Color.Blue;
                picture.SizeMode = PictureBoxSizeMode.StretchImage;
                picture.SetBounds(random.Next(621, 967), random.Next(56, 647), 100, 50);
                this.Controls.Add(picture);
                sayac++;

            }