Drawstring?

I am trying to draw a string from a string array ( app[0] ) in a picturebox but i am receiving an exception (generic error occured in GDI+) any help? g.DrawString(app[0],new System.Drawing.Font("Vrinda", 15.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))),new SolidBrush(Color.Magenta),x1,y1);