private void btnNext_Click(object sender, EventArgs e)
{
int serialNo = ImageList.Where(p => p.KeyId == currImageKey).FirstOrDefault().SerialNo;
int count = ImageList.Count();
if (serialNo < count)
{
var currentImage = ImageList.Where(p => p.SerialNo == serialNo + 1).FirstOrDefault();
this.currImageKey = currentImage.KeyId;
showImage(currentImage.ImageInfo);
}
}