example

private bool loadElement()
        {
            DenResourceFilesHandler resourceHandler = new DenResourceFilesHandler(Session);

            //Fetch the portals dll etc. from the database
            EpcResourceFilesIdentity resourceId = new EpcResourceFilesIdentity() { Cotstd_Stdid = currentElement.Dashboard_Stdid, Id = currentElement.Resource_Id, Seqno = 0 };
            Assembly assembly = null;
            if (!resourceHandler.IsBuiltinResource(resourceId.Id))
            {
                string filename = resourceHandler.GetResource(resourceId);

                if (!String.IsNullOrEmpty(filename))
                {
                    //Load it
                    assembly = resourceHandler.LoadAssembly(filename);
                }
            }
            else
            {
                assembly = resourceHandler.GetLoadedAssembly(resourceId.Id == "USERINTERFACE" ? "xxx.dll" : "xxxxx.dll");
            }

            if (assembly != null)
            {
                // Walk through each type in the assembly
                foreach (Type type in assembly.GetTypes())
                {
                    // Check if type is a class and its name matches currentElement's class name
                    if (type.IsClass && type.Name.Equals(currentElement.Classname))
                    {
                        // Array of constructors' required parameter types
                        Type[] constructorParamTypes = new Type[] 
                        { 
                            typeof(IdesSession), 
                            typeof(EpcDashboardElements), 
                            typeof(decimal?) 
                        };

                        object o = null;
                        ConstructorInfo ci = type.GetConstructor(constructorParamTypes);

                        // Check if the constructor with required parameter types exists
                        if (ci != null)
                        {
                            // Invoke constructor with provided parameters
                            o = ci.Invoke(new object[] { Session, currentElement, currentContext });
                        }
                        else
                        {
                            // Check if default constructor exists
                            ci = type.GetConstructor(Type.EmptyTypes);
                            if (ci != null)
                            {
                                // Invoke default constructor
                                o = ci.Invoke(null);
                            }
                        }

                        // If object implements IIdesDashboardElement interface, set session
                        if (o is IDenDashboardElement)
                        {
                            (o as IDenDashboardElement).SetSession(Session);
                        }

                        // Convert object to Control type
                        currentControl = o as Control;
                        if (currentControl != null)
                        {
                            // Set dock style to fill
                            currentControl.Dock = DockStyle.Fill;
                        }
                    }

                    // Pick up a class
                    if (type.IsClass == true && type.Name.Equals(currentElement.Classname))
                    {
                        Type[] citypes = new Type[3];
                        citypes[0] = typeof(DenSession);
                        citypes[1] = typeof(EpcDashboardElements);
                        citypes[2] = typeof(decimal?);
                        object o = null;

                        ConstructorInfo ci = type.GetConstructor(citypes);
                        if (ci != null)
                        {
                            o = ci.Invoke(new object[] { Session, currentElement, currentContext });
                        }
                        else
                        {
                            ci = type.GetConstructor(Type.EmptyTypes);
                            if (ci != null)
                                o = ci.Invoke(null);
                        }

                        if (o is IDensDashboardElement)
                        {
                            (o as IDensDashboardElement).SetSession(Session);
                        }

                        currentControl = o as Control;
                        if (currentControl != null)
                        {
                            currentControl.Dock = DockStyle.Fill;
                        }
                    }
                }

                if (currentControl != null)
                {
                    initGridViews(currentControl);
                    this.Controls.Add(currentControl);
                }
            }

            return true;
        }