/// <summary>
 /// メインウィンドウ以外のウィンドウを終了します
 /// </summary>
 private void windowsclose()
 {
     if (this.minimizedwindow != null)
     {
         this.minimizedwindow.Close();
         this.minimizedwindow = null;
     }
 }
 private void WindowMinimize()
 {
     if (this.minimizedwindow == null)
     {
         this.minimizedwindow = new MinimizedWindow();
         this.minimizedwindow.mainwindow = this;
     }
     this.Hide();
     this.minimizedwindow.Show();
 }