/// <summary>
/// コンストラクタ
/// </summary>
/// <param name="cultureInfo">言語情報</param>
public LangMenuItem(CultureInfo cultureInfo, bool isChecked)
{
CultureInfo = cultureInfo;
IsChecked = new ReactivePropertySlim <bool>(isChecked);
IsCheckable = IsChecked.Inverse().ToReadOnlyReactivePropertySlim();
}