HOW TO SAVE IMAGE IN FOLDER AFTER CREATE SETUP IN C# WIN APP

i want to save image in folder in my c# window app, all is working fine in the visual studio

but after create setup when i save the data an error occured named 'a generic error occured in gdi+'

 

my code is to save the image  :

 

pictureBox1.Image.Save(Application.StartupPath + "\\Cust_Images\\" + lblCustId.Text + ".jpg", System.Drawing.Imaging.ImageFormat.Png); 

 

please help