/// <summary>
        /// Creates a property for a "::Ferda::Modules::StringT". There can be not 
        /// only string, but also types of ComboBoxes and this method decides, which
        /// FerdaPropertySpec will be created
        /// </summary>
        /// <param name="pinfo">Information about the property</param>
        /// <param name="box">Box where it finds the other property</param>
        /// <param name="bag">Bag where to put the FerdaPropertySpec</param>
        protected void CreateStringProperty(PropertyInfo pinfo, IBoxModule box, PropertyTable bag)
        {
            FerdaPropertySpec ps;
            SelectString[] array;

            //determining the type of the property
            array = box.GetPropertyOptions(pinfo.name);

            if (array.Length == 0) //it is a normal string property
            {
                SocketInfo si = box.MadeInCreator.GetSocket(pinfo.name);

                ps = new FerdaPropertySpec(si.label, typeof(string), false);
                ps.Category = pinfo.categoryName;
                ps.Description = si.hint;
                if (box.IsPropertyReadOnly(pinfo.name) || box.GetPropertySocking(pinfo.name))
                {
                    ps.Attributes = new Attribute[]
                        {
                            ReadOnlyAttribute.Yes
                        };
                }

                bag.Properties.Add(ps);

                //adding the asynch stuff
                AddAsyncTemporary(pinfo.name, "System.String", !IsOneBoxSelected);
            }
            else //a combo-box should be used
            {
                //if there are more boxes selected, the property should not be added
                if (!IsOneBoxSelected)
                {
                    return;
                }

                if (box.ArePropertyOptionsObligatory(pinfo.name))
                //this means user cannot edit values
                {
                    SocketInfo si = box.MadeInCreator.GetSocket(pinfo.name);

                    ps = new FerdaPropertySpec(si.label, typeof(StringSequence), false);
                    ps.Category = pinfo.categoryName;
                    ps.Description = si.hint;

                    //atributes
                    if (box.IsPropertyReadOnly(pinfo.name) || box.GetPropertySocking(pinfo.name))
                    {
                        ps.Attributes = new Attribute[]
                            {
                            ReadOnlyAttribute.Yes,
                            new EditorAttribute(typeof(StringComboEditor), typeof(System.Drawing.Design.UITypeEditor)),
                            new TypeConverterAttribute(typeof(StringSequenceConverter))
                            };
                    }
                    else
                    {
                        ps.Attributes = new Attribute[]
                            {
                            new EditorAttribute(typeof(StringComboEditor), typeof(System.Drawing.Design.UITypeEditor)),
                            new TypeConverterAttribute(typeof(StringSequenceConverter))
                            };
                    }

                    //adding to the bag
                    bag.Properties.Add(ps);
                }
                else
                //user can add his own option to the string selection
                {
                    SocketInfo si = box.MadeInCreator.GetSocket(pinfo.name);

                    ps = new FerdaPropertySpec(si.label, typeof(StringSequence), false);
                    ps.Description = si.hint;
                    ps.Category = pinfo.categoryName;

                    //atributes
                    if (box.IsPropertyReadOnly(pinfo.name) || box.GetPropertySocking(pinfo.name))
                    {
                        ps.Attributes = new Attribute[]
                            {
                            ReadOnlyAttribute.Yes,
                            new EditorAttribute(typeof(StringComboAddingEditor), typeof(System.Drawing.Design.UITypeEditor)),
                            new TypeConverterAttribute(typeof(StringSequenceConverter))
                            };
                    }
                    else
                    {
                        ps.Attributes = new Attribute[]
                            {
                            new EditorAttribute(typeof(StringComboAddingEditor), typeof(System.Drawing.Design.UITypeEditor)),
                            new TypeConverterAttribute(typeof(StringSequenceConverter))
                            };
                    }

                    //adding to the bag
                    bag.Properties.Add(ps);
                }

                //adding the asynch stuff
                if (IsOneBoxSelected)
                {
                    AddAsyncTemporary(pinfo.name,
                        "Ferda.FrontEnd.Properties.StringSequence", false);
                }
            }
        }