public SaveImageModel(BitmapSource imageToSave)
{
this.imageToSave = imageToSave.ThrowIfNull();
var saveDialog = new SaveFileDialog();
saveDialog.FileName = "SharpGraph " + System.DateTime.Now.ToString().Replace(new char[] { '/', ':' }, '-');
saveDialog.DefaultExt = ".png";
saveDialog.Filter = "PNG Image Files (.png)|*.png";
var result = saveDialog.ShowDialog();
if (result == true)
{
Console.WriteLine(saveDialog.FileName);
this.fileName = saveDialog.FileName;
this.Save();
}
}