예제 #1
0
 public static MonthlySaleTax GetInstance()
 {
     if (singleton == null)
     {
         singleton = new MonthlySaleTax();
     }
     return(singleton);
 }
예제 #2
0
 private void MonthlySaleTax_FormClosed(object sender, FormClosedEventArgs e)
 {
     singleton = null;
 }