How To Give The Start Up Path To My Project Because When I Save My Project To Any Other Folder Then They Giving Me Path Error How To Resolve This While Using Start Up Path?

const string new_dir = @"F:\Documents and Settings\Misbah Khan Afridi\My Documents\Visual Studio 2010\Projects\WindowsFormsApplication2\WindowsFormsApplication2\Images";
           string extension = System.IO.Path.GetExtension(oldPath);
           string renamed_name = textBox1.Text + "" + extension;
           string fName = System.IO.Path.Combine(new_dir, renamed_name);
           if (File.Exists(fName))
               File.Delete(fName);
           System.IO.File.Copy(oldPath, fName);
           pictureBox1.Image = null;