Display images in PictureBox using OpenFileDialog in Windows Forms Application

string savepath = @"C:/BrainScript/" + clientname + "/";
if (!Directory.Exists(savepath ))
    Directory.CreateDirectory(savepath);
picFP.Image.Save(savepath + clientname + "_" + lblimgname.Text + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
//  OpenFileDialog open = new OpenFileDialog();
switch (lblimgname.Text)
{
    case "Right Thumb 1":
         string rtpath = savepath + clientname + "_Right Thumb1" + ".jpg";
         picRightthumb1.Image = new Bitmap(rtpath);
         break;
}

Hi Team, I have written code to store picturebox image into folder and at a time displaying that image into another picture box but i am getting Invalid Parameter error pls tell me how to solve this problem