[WPF] Window나 UserControl 생성자에서 디자인타임에 실행방지

using System.ComponentModel;

public partial class TestUc : UserControl
{
	private Config config;

	public TestUc()
	{
		InitializeComponent();

		if (DesignerProperties.GetIsInDesignMode(this)) return;

		config = Config.Instance;
	}
}