[C#] Picturebox를 투명하게

LicenseLabel.Parent = pictureBox1;
LicenseLabel.BackColor = Color.Transparent;
LicenseLabel.BringToFront();

LicenseLabel.BackColor = Color.Transparent;
LicenseLabel.Width = this.Width;
LicenseLabel.Left = 0;
LicenseLabel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
LicenseLabel.Parent = pictureBox1;