private void button3_Click(object sender, EventArgs e)
{
Work_Data data = new Work_Data();
data.Delete_Data(comboBox1.SelectedItem.ToString());
comboBox1.Items.Clear();
UsersContext context = new UsersContext();
foreach (var r in context.Passwords.ToList())
{
comboBox1.Items.Add(r.login);
}
}