OpenFileDialog openImageDialog = new OpenFileDialog();

 openImageDialog.Filter = "Image Files (*.jpg;*.png)|*.jpg;*.png";

 openImageDialog.Multiselect = false;

 if (openImageDialog.ShowDialog() == DialogResult.OK)

 {

    MessageBox.Show(openImageDialog.FileName);

 }

 else

 {

 }

 SaveFileDialog saveImageDialog = new SaveFileDialog();

  saveImageDialog.Filter = "Image Files (*.jpg;*.png)|*.jpg;*.png";

   //openImageDialog.Multiselect = false;

   if (saveImageDialog.ShowDialog() == DialogResult.OK)

   {

       MessageBox.Show(saveImageDialog.FileName);

   }

   else

   {

   }

FolderBrowserDialog folderDlg = new FolderBrowserDialog();

if(folderDlg.ShowDialog()==DialogResult.OK)

    MessageBox.Show(folderDlg.SelectedPath);