C# (CSharp) CapaPresentacion frmCaja示例

示例#1

 public static frmCaja GetInstancia()
 {
     if (Instancia == null)
     {
         Instancia = new frmCaja();
     }
     return(Instancia);
 }

示例#2

 private void frmCaja_FormClosing(object sender, FormClosingEventArgs e)
 {
     Instancia = null;
 }