void DisplayExpensesForm()
 {
     if (expensesForm == null || expensesForm.IsDisposed)
     {
         this.expensesForm      = FormFactory.CreateExpensesForm(this);
         expensesForm.MdiParent = this;
     }
     expensesForm.Show();
 }
 void DisplayExpensesForm()
 {
     if (expensesForm == null || expensesForm.IsDisposed)
     {
         this.expensesForm = FormFactory.CreateExpensesForm(this);
         expensesForm.MdiParent = this;
     }
     expensesForm.Show();
 }