protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
bindingSource.DataSource = _viewModel;
ViewModelValidator.AttachControlDecoratorsRecursive <WorldVariableViewModel, TextBox, TextBoxDecorator>(_viewModel, this);
ViewModelValidator.AttachToolTipRecursive <WorldVariableViewModel, TextBox>(_viewModel, this, toolTip);
ViewModelValidator.AttachToolTip(_viewModel, pictureBoxValidationError, toolTip);
_viewModel.Validate();
ActiveControl = promptTextBoxName;
}