interface IMultilangual
    {
        SupportedLanguages CurrentLanguage { get;}
    }

    public enum SupportedLanguages
    {
        NDef,
        German
    }

    public class Multilangual_Attribute : Attribute
    {
        public Multilangual_Attribute() { }
 
        public string GenerateString(string name, SupportedLanguages _
          CurrentLanguage)
        {
            // hier ist der teil wo ich die Datenquelle auslese
            // mir ist klar, dass die nächste zeile hier nichts verloren hat ( _
              Performance)
            SqlConnection con = new SqlConnection();
            con.ConnectionString = "Data Source=Rossis-Acer\\***;Initial" & _
              "Catalog=***;User Id=****;Password=****;";
            con.Open();
 
            SqlCommand cmd = con.CreateCommand();
 
            cmd.CommandText = "SELECT MLa_" + CurrentLanguage.ToString() + "" & _
              "FROM Multilingual WHERE MLa_ControlName LIKE '" + name + "'";
 
            return (string)cmd.ExecuteScalar();
        }
    }

    public partial class Multilangual_Form : Form, IMultilangual
    {
        public Multilangual_Form()
        {
            InitializeComponent();
 
            m_CurrentLanguage = SupportedLanguages.German;
        }
 
        private SupportedLanguages m_CurrentLanguage;
        public SupportedLanguages CurrentLanguage
        {
            get { return m_CurrentLanguage; }
        }
    }

    [Multilangual_Attribute()]
    public partial class Multilangual_Label : System.Windows.Forms.Label 
    {
        public Multilangual_Label()
        {
            InitializeComponent();
        }
 
        private SupportedLanguages m_CurrentLanguage;
        public SupportedLanguages CurrentLanguage
        {
            get { return m_CurrentLanguage; }
        }
 
        public override string Text
        {
            get
            {
                Multilangual_Attribute MultiLanguage = ( _
                  Multilangual_Attribute)Attribute.GetCustomAttribute(typeof( _
                  Multilangual_Label), typeof(Multilangual_Attribute));
 
                if (MultiLanguage == null)
                    return this.Text ;
                else
                    return MultiLanguage.GenerateString(this.Name, _
                      this.CurrentLanguage);
            }
        }
 
        protected override void OnParentChanged(EventArgs e)
        {
            base.OnParentChanged(e);
            if (this.Parent != null)
                if (this.Parent is IMultilangual   )
                    this.m_CurrentLanguage = (( _
                      IMultilangual)this.Parent).CurrentLanguage;
        }
    }

            Multilangual_Label lbl = new Multilangual_Label();
            lbl.Name = "dtp_Date";
 
            Multilangual_Form frm = new Multilangual_Form();
 
            frm.Controls.Add(lbl);
 
            Console.WriteLine(lbl.Text);