private void LoginForm_Load(object sender, EventArgs e)
{
LoginTextBox.Invoke(new MethodInvoker(() =>
{
LoginTextBox.AutoCompleteMode = AutoCompleteMode.Append;
LoginTextBox.AutoCompleteSource = AutoCompleteSource.CustomSource;
var loginAutoCompleteSource = new AutoCompleteStringCollection();
loginAutoCompleteSource.AddRange(context.Users.Select(user => user.Login).ToArray());
LoginTextBox.AutoCompleteCustomSource = loginAutoCompleteSource;
}));
}
