C# (CSharp) lab8._2 filter примеры использования

Пример #1

 private void button3_Click(object sender, EventArgs e)
 {
     fil = new filter();
     fil.Show();
 }

Пример #2

 public info_form()
 {
     _i  = this;
     fil = new filter();
     InitializeComponent();
 }