//allows user to rename image
private void RenameImage()
{
RenameWindow renameWindow = new RenameWindow(FileName, this);
renameWindow.Show();
imageIsSaved = false;
}
public RenameWindowViewModel(string fileName, MainWindowViewModel mainWindowViewModel, RenameWindow renameWindow)
{
this._fileName = fileName;
this._mainWindowViewModel = mainWindowViewModel;
this._renameWindow = renameWindow;
}